Drop Requires on python3-importlib-metadata for RHEL9+ and Fedora >32.
Change-Id: I017f464acaf40b3f9152b3da33a6eeb7f05410fc
https: //review.rdoproject.org/r/c/openstack/stevedore-distgit/+/32501
(cherry picked from commit 5127abb49bfad1fa22801073af7dc0c5f8bbb467)