`git version` on macOS returns e.g., "git version 2.30.1 (Apple
Git-130)" and `vc-git--program-version` currently returns "0" instead
of "2.30.1".
* lisp/vc/vc-git.el (vc-git--program-version): Ignore text after
the version number when parsing git versions (bug#52172).
Copyright-paperwork-exempt: yes