Add __name__ to _Wrapped in functools

[tmke8]

There can be scenarios where __name__ isn't set, as pointed out here: python/mypy#14815 (comment) but the same is true for Callable, so this has precedent.

[tmke8]

Mypy primer looks as expected 🚀

[AlexWaygood]

LGTM. @erictraut, does this make sense to you?

[github-actions]

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

pandas (https://github.com/pandas-dev/pandas)
- pandas/core/strings/accessor.py:130: error: "_Wrapped[<nothing>, <nothing>, [Any, VarArg(Any), KwArg(Any)], Any]" has no attribute "__name__" [attr-defined]
spark (https://github.com/apache/spark)
- python/pyspark/sql/udf.py:428: error: "_Wrapped[[VarArg(Any), KwArg(Any)], Any, [VarArg(Union[Column, str])], Column]" has no attribute "__name__" [attr-defined]- python/pyspark/sql/connect/udf.py:159: error: "_Wrapped[[VarArg(Any), KwArg(Any)], Any, [VarArg(Union[Column, str])], Column]" has no attribute "__name__" [attr-defined]
streamlit (https://github.com/streamlit/streamlit)
- lib/streamlit/deprecation_util.py: note: In function "deprecate_func_name":- lib/streamlit/deprecation_util.py:81:5: error: "_Wrapped[<nothing>, <nothing>, [VarArg(Any), KwArg(Any)], Any]" has no attribute "__name__" [attr-defined]

[erictraut]

Yeah, makes sense to me.