[Static Runtime] Fix aten::index_put list conversions (#85298)
Summary: Apparently static runtime's list construct return value is always a `GenericList`, so we cannot use the `toOptionalTensorList` method in the general case -- we must convert each item individually.
Test Plan: New unit test
Differential Revision: D39628979
Pull Request resolved: https://github.com/pytorch/pytorch/pull/85298
Approved by: https://github.com/tenpercent
