Pyrefly suppressions 7/n (#164913)

Adds suppressions to pyrefly will typecheck clean: https://github.com/pytorch/pytorch/issues/163283

Almost there!

Test plan:
dmypy restart && python3 scripts/lintrunner.py -a
pyrefly check

step 1: delete lines in the pyrefly.toml file from the project-excludes field
step 2: run pyrefly check
step 3: add suppressions, clean up unused suppressions
before: https://gist.github.com/maggiemoss/4b3bf2037014e116bc00706a16aef199

after:
 INFO 0 errors (6,884 ignored)

Pull Request resolved: https://github.com/pytorch/pytorch/pull/164913
Approved by: https://github.com/oulgen

torch/_dynamo/polyfills/os.py

@@ -17,6 +17,7 @@ __all__ = ["fspath"]
 @substitute_in_graph(os.fspath, can_constant_fold_through=True)
 def fspath(path: AnyStr | os.PathLike[AnyStr]) -> AnyStr:
     if isinstance(path, (str, bytes)):
+        # pyrefly: ignore  # bad-return
         return path
 
     path_type = type(path)