fix: Pyrefly gets confused if a class has the same name as an overloaded method

[tannguyencse19]

Summary

Add a static type name lookup variant that skips class-scope flow entries whose value style is FlowStyle::FunctionDef.
Route lookups performed under Usage::StaticTypeInformation to this static type lookup path, leaving all other usages unchanged.

Fixes #1697

Test Plan

cargo test -p pyrefly test_overload_method_name_matches_class

[rchen152]

This isn't quite right. If a name is shadowed by a function definition, a type checker should error if it is used as a type annotation: https://github.com/python/typing/blob/211b0cb5470e856f6093f7c3d688295f72f78bb6/conformance/tests/annotations_forward_refs.py#L89. We should only skip @overload-decorated signatures.

[tannguyencse19]

@rchen152 I push a new commit to address this: 55189db . Please review. Thanks

[github-actions]

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

pandas (https://github.com/pandas-dev/pandas)
- ::error file=pandas/core/indexing.py,line=1470,col=9,endLine=1470,endColumn=28,title=Pyrefly bad-override::Class member `_LocIndexer._convert_to_indexer` overrides parent class `_LocationIndexer` in an inconsistent manner%0A  `_LocIndexer._convert_to_indexer` has type `BoundMethod[_LocIndexer, (self: _LocIndexer, key: Unknown, axis: int) -> ndarray[tuple[Any, ...], dtype[signedinteger[_NBitIntP]]] | ndarray[tuple[Any, ...], dtype[Any]] | dict[str, int | integer[Any]] | dict[str, tuple[Unknown, ...]] | dict[str, Unknown] | Unknown]`, which is not assignable to `BoundMethod[_LocIndexer, (self: _LocIndexer, key: Unknown, axis: int) -> Never]`, the type of `_LocationIndexer._convert_to_indexer`
+ ::error file=pandas/core/indexing.py,line=1470,col=9,endLine=1470,endColumn=28,title=Pyrefly bad-override::Class member `_LocIndexer._convert_to_indexer` overrides parent class `_LocationIndexer` in an inconsistent manner%0A  `_LocIndexer._convert_to_indexer` has type `BoundMethod[_LocIndexer, (self: _LocIndexer, key: Unknown, axis: int) -> int | ndarray[tuple[int], dtype[Any]] | ndarray[tuple[Any, ...], dtype[signedinteger[_NBitIntP]]] | ndarray[tuple[Any, ...], dtype[Any]] | slice[int, int, Any] | slice[Any, Any, Any] | dict[str, int | integer[Any]] | dict[str, tuple[Unknown, ...]] | dict[str, Unknown] | Unknown]`, which is not assignable to `BoundMethod[_LocIndexer, (self: _LocIndexer, key: Unknown, axis: int) -> Never]`, the type of `_LocationIndexer._convert_to_indexer`