gh-111789: Use PyDict_GetItemRef() in Python/bltinmodule.c#112081

ambv merged 3 commits intopython:mainpython/cpython:mainfrom

serhiy-storchaka:use-dict_getitemref-Python/bltinmodule.cserhiy-storchaka/cpython:use-dict_getitemref-Python/bltinmodule.cCopy head branch name to clipboard