Add metadata server host

[superzc-github]

What does this PR do?

add minion configs parameter metadata_server_host for /salt/metadata.py to handle the cloud providers which not using 169.254.169.254 as metadata server

What issues does this PR fix or reference?

#61548

Previous Behavior

when metadata_server_grains=true the /salt/metadata.py functions will fetch metadata from 169.254.169.254 without any other choices

New Behavior

Allow clients to specify a custom metadata server host for the grains feature of metadata_server_grains=true when metadata_server_grains=true the /salt/metadata.py functions will fetch metadata from the host set with minion config parameter metadata_server_host first, if metadata_server_host is not set the function will fetch from 169.254.169.254 by default.

Merge requirements satisfied?

[NOTICE] Bug fixes or features added to Salt require tests.

• [ ] Docs
• [ ] Changelog - https://docs.saltproject.io/en/master/topics/development/changelog.html
• [ ] Tests written/updated

Commits signed with GPG?

No

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See GitHub's page on GPG signing for more information about signing commits with GPG.

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Detected Issues (click me)

Check Known Missing Docstrings...........................................Failed
- hook id: invoke
- duration: 1.48s
- exit code: 1
/home/runner/.cache/pre-commit/repo_6hm1ct_/py_env-python3/lib/python3.9/site-packages/_distutils_hack/init.py:30: UserWarning: Setuptools is replacing distutils.
warnings.warn("Setuptools is replacing distutils.")
The function 'metadata' on 'salt/grains/metadata.py' does not have a docstring
Found 1 errors

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Thanks again!

[Ch3LL]

@superzc-github do you have time to loop back to this PR for the feedback and adding test coverage?

[Ch3LL]

bump @superzc-github did you see my feedback?

[Ch3LL]

Closing due to inactivity. Please let me know if you want me to re-open the PR or you can submit a new PR against the master branch with the test coverage for this change.