mypy

b68c545e - Bind self to the class being defined when checking multiple inheritance (#18465)

Bind self to the class being defined when checking multiple inheritance (#18465) Fixes #18458. When checking base class compatibility, the class being defined is not yet in scope. However, it should be equivalent to the class passed to `bind_and_map_method` with free typevars, as that's exactly what we are currently defining.