[3.14] gh-132775: Unrevert "Add _PyCode_VerifyStateless()" (gh-133625)

This reverts commit 3c73cf5 (gh-133497), which itself reverted
the original commit d270bb5 (gh-133221).

We reverted the original change due to failing android tests.
The checks in _PyCode_CheckNoInternalState() were too strict,
so we've relaxed them.