Optional Default Parameter for GetParameter

[jaredbroad]

Expected Behavior

GetParameter takes a default arg.

Actual Behavior

GetParameter only allows specifying name

Potential Solution

Adding an optional arg to GetParameter

Checklist

• [x] I have completely filled out this template
• [x] I have confirmed that this issue exists on the current master branch
• [x] I have confirmed that this is not a duplicate issue by searching issues

[Martin-Molinero]

It would be nice to have number overloads to avoid the type conversions in the algorithm.

See https://github.com/QuantConnect/Lean/pull/6452#discussion_r910433048