Fix issue where an :func:`issubclass` check comparing a class X against a
:func:`runtime-checkable protocol <typing.runtime_checkable>` Y with
non-callable members would not cause :exc:`TypeError` to be raised if an
:func:`isinstance` call had previously been made comparing an instance of X
to Y. This issue was present in edge cases on Python 3.11, but became more
prominent in 3.12 due to some unrelated changes that were made to
runtime-checkable protocols. Patch by Alex Waygood.