Add bindings for `LogicalPlan::SubqueryAlias`

[jdye64]

Is your feature request related to a problem or challenge? Please describe what you are trying to do.
The bindings for LogicalPlan::SubqueryAlias are currently missing. We should add them in the Python expr module.

Describe the solution you'd like
subquery_alias.rs file in the python expr module that contains the bindings for the related LogicalPlan::SubqueryAlias logic in DataFusion.

Describe alternatives you've considered
None

Additional context
None