…103151)This involves 3 changes: some general cleanup, checks to match the kind of module, and switch from testing against sys to _imp.This is a precursor togh-103150, though the changes are meant to stand on their own.

Decref the key in the right interpreter in _extensions_cache_set().This is a follow-up topythongh-103084. I found the bug while working onpythongh-101660.

pythongh-103151)This involves 3 changes: some general cleanup, checks to match the kind of module, and switch from testing against sys to _imp.This is a precursor topythongh-103150, though the changes are meant to stand on their own.