Merge PR #66244 into wip-pdonnell-testing-20260127.160833-debug

* refs/pull/66244/head:
	mgr/Gil.cc: simplify Gil(), ~Gil()
	mgr/Gil.cc: do not use PyGILState_Check()
	mgr: add mgr_subinterpreter_modules config
	python-common/.../service_spec: implement ServiceSpec.__getnewargs__ to allow unpickle to work correctly
	mgr: serialize python objects sent between subinterpreters via remote

diff --cc src/python-common/ceph/deployment/service_spec.py
Simple merge