[3.12] gh-105699: Use a Thread-Local Variable for PKGCONTEXT (gh-105740)#105765

ericsnowcurrently merged 1 commit intopython:3.12python/cpython:3.12from

miss-islington:backport-b87d288-3.12miss-islington/cpython:backport-b87d288-3.12Copy head branch name to clipboard