Accept iterables in methods of Set and MutableSet

[Gatsik]

[github-actions[bot]]

Diff from mypy_primer, showing the effect of this PR on open source code:

discord.py (https://github.com/Rapptz/discord.py)
- discord/ext/commands/hybrid.py:508: error: Overlap between argument names and ** TypedDict items: "name", "description"  [misc]
+ discord/ext/commands/hybrid.py:508: error: Overlap between argument names and ** TypedDict items: "description", "name"  [misc]
- discord/ext/commands/hybrid.py:629: error: Overlap between argument names and ** TypedDict items: "name", "description"  [misc]
+ discord/ext/commands/hybrid.py:629: error: Overlap between argument names and ** TypedDict items: "description", "name"  [misc]
- discord/ext/commands/hybrid.py:834: error: Overlap between argument names and ** TypedDict items: "name", "with_app_command"  [misc]
+ discord/ext/commands/hybrid.py:834: error: Overlap between argument names and ** TypedDict items: "with_app_command", "name"  [misc]
- discord/ext/commands/hybrid.py:858: error: Overlap between argument names and ** TypedDict items: "name", "with_app_command"  [misc]
+ discord/ext/commands/hybrid.py:858: error: Overlap between argument names and ** TypedDict items: "with_app_command", "name"  [misc]
- discord/ext/commands/hybrid.py:883: error: Overlap between argument names and ** TypedDict items: "name", "with_app_command"  [misc]
+ discord/ext/commands/hybrid.py:883: error: Overlap between argument names and ** TypedDict items: "with_app_command", "name"  [misc]
- discord/ext/commands/hybrid.py:935: error: Overlap between argument names and ** TypedDict items: "name", "with_app_command"  [misc]
+ discord/ext/commands/hybrid.py:935: error: Overlap between argument names and ** TypedDict items: "with_app_command", "name"  [misc]
- discord/ext/commands/bot.py:290: error: Overlap between argument names and ** TypedDict items: "name", "with_app_command"  [misc]
+ discord/ext/commands/bot.py:290: error: Overlap between argument names and ** TypedDict items: "with_app_command", "name"  [misc]
- discord/ext/commands/bot.py:314: error: Overlap between argument names and ** TypedDict items: "name", "with_app_command"  [misc]
+ discord/ext/commands/bot.py:314: error: Overlap between argument names and ** TypedDict items: "with_app_command", "name"  [misc]

[github-actions[bot]]

Diff from mypy_primer, showing the effect of this PR on open source code:

pandas (https://github.com/pandas-dev/pandas)
+ pandas/core/dtypes/cast.py:865: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas/core/dtypes/cast.py:866: error: Unused "type: ignore" comment  [unused-ignore]

pydantic (https://github.com/pydantic/pydantic)
+ pydantic/v1/main.py:907: error: Incompatible types in assignment (expression has type "set[int | str] | set[str]", variable has type "AbstractSet[str]")  [assignment]
- pydantic/v1/main.py:907: error: Set comprehension has incompatible type Set[int | str]; expected Set[str | None]  [misc]
- pydantic/v1/main.py:907: note: Left operand is of type "set[str] | dict_keys[str, Any]"

ibis (https://github.com/ibis-project/ibis)
+ ibis/backends/sql/datatypes.py:1397: error: Key expression in dictionary comprehension has incompatible type "str | Any | None"; expected type "str"  [misc]
- ibis/backends/sql/datatypes.py:1397: error: Value expression in dictionary comprehension has incompatible type "type[Any]"; expected type "SqlglotType"  [misc]
+ ibis/backends/sql/datatypes.py:1397: error: Value expression in dictionary comprehension has incompatible type "type[SqlglotType] | type[Any]"; expected type "SqlglotType"  [misc]
- ibis/backends/sql/datatypes.py:1398: error: Unsupported operand types for - ("set[type[Never]]" and "set[type[SqlglotType]]")  [operator]
- ibis/expr/datatypes/tests/test_core.py:581: error: Unsupported operand types for - ("set[type[Never]]" and "set[AnnotableMeta]")  [operator]

jax (https://github.com/google/jax)
+ jax/_src/interpreters/batching.py:231: error: Unused "type: ignore" comment  [unused-ignore]

discord.py (https://github.com/Rapptz/discord.py)
- ...typeshed_to_test/stdlib/typing.pyi:1043: note: "update" of "TypedDict" defined here
+ ...typeshed_to_test/stdlib/typing.pyi:1044: note: "update" of "TypedDict" defined here
- discord/ext/commands/hybrid.py:508: error: Overlap between argument names and ** TypedDict items: "description", "name"  [misc]
+ discord/ext/commands/hybrid.py:508: error: Overlap between argument names and ** TypedDict items: "name", "description"  [misc]
- discord/ext/commands/hybrid.py:629: error: Overlap between argument names and ** TypedDict items: "description", "name"  [misc]
+ discord/ext/commands/hybrid.py:629: error: Overlap between argument names and ** TypedDict items: "name", "description"  [misc]

[github-actions[bot]]

Diff from mypy_primer, showing the effect of this PR on open source code:

pandas (https://github.com/pandas-dev/pandas)
+ pandas/core/dtypes/cast.py:865: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas/core/dtypes/cast.py:866: error: Unused "type: ignore" comment  [unused-ignore]

pydantic (https://github.com/pydantic/pydantic)
- pydantic/v1/main.py:907: error: Set comprehension has incompatible type Set[int | str]; expected Set[str | None]  [misc]
- pydantic/v1/main.py:907: note: Left operand is of type "set[str] | dict_keys[str, Any]"

ibis (https://github.com/ibis-project/ibis)
- ibis/backends/sql/datatypes.py:1398: error: Unsupported operand types for - ("set[type[Never]]" and "set[type[SqlglotType]]")  [operator]
- ibis/expr/datatypes/tests/test_core.py:581: error: Unsupported operand types for - ("set[type[Never]]" and "set[AnnotableMeta]")  [operator]

jax (https://github.com/google/jax)
+ jax/_src/interpreters/batching.py:231: error: Unused "type: ignore" comment  [unused-ignore]

discord.py (https://github.com/Rapptz/discord.py)
- ...typeshed_to_test/stdlib/typing.pyi:1043: note: "update" of "TypedDict" defined here
+ ...typeshed_to_test/stdlib/typing.pyi:1044: note: "update" of "TypedDict" defined here
- discord/ext/commands/hybrid.py:508: error: Overlap between argument names and ** TypedDict items: "description", "name"  [misc]
+ discord/ext/commands/hybrid.py:508: error: Overlap between argument names and ** TypedDict items: "name", "description"  [misc]
- discord/ext/commands/hybrid.py:629: error: Overlap between argument names and ** TypedDict items: "description", "name"  [misc]
+ discord/ext/commands/hybrid.py:629: error: Overlap between argument names and ** TypedDict items: "name", "description"  [misc]
- discord/ext/commands/hybrid.py:834: error: Overlap between argument names and ** TypedDict items: "with_app_command", "name"  [misc]
+ discord/ext/commands/hybrid.py:834: error: Overlap between argument names and ** TypedDict items: "name", "with_app_command"  [misc]
- discord/ext/commands/hybrid.py:858: error: Overlap between argument names and ** TypedDict items: "with_app_command", "name"  [misc]
+ discord/ext/commands/hybrid.py:858: error: Overlap between argument names and ** TypedDict items: "name", "with_app_command"  [misc]
- discord/ext/commands/hybrid.py:883: error: Overlap between argument names and ** TypedDict items: "with_app_command", "name"  [misc]
+ discord/ext/commands/hybrid.py:883: error: Overlap between argument names and ** TypedDict items: "name", "with_app_command"  [misc]
- discord/ext/commands/hybrid.py:935: error: Overlap between argument names and ** TypedDict items: "with_app_command", "name"  [misc]
+ discord/ext/commands/hybrid.py:935: error: Overlap between argument names and ** TypedDict items: "name", "with_app_command"  [misc]
- discord/ext/commands/bot.py:290: error: Overlap between argument names and ** TypedDict items: "with_app_command", "name"  [misc]
+ discord/ext/commands/bot.py:290: error: Overlap between argument names and ** TypedDict items: "name", "with_app_command"  [misc]
- discord/ext/commands/bot.py:314: error: Overlap between argument names and ** TypedDict items: "with_app_command", "name"  [misc]
+ discord/ext/commands/bot.py:314: error: Overlap between argument names and ** TypedDict items: "name", "with_app_command"  [misc]