This can cause a weakref for a class to be decref'ed in the wrong interpreter (or even when the GIL isn't held). The solution is to have a separate registry for each interpreter for heap types. Static types would stay global.

Linked PRs

• gh-110310: Add a Per-Interpreter XID Registry for Heap Types #110311
• [3.12] gh-110310: Add a Per-Interpreter XID Registry for Heap Types (gh-110311) #110712
• [3.12] gh-110310: Add a Per-Interpreter XID Registry for Heap Types (gh-110311) #110714