ci: target release-X.Y.x branches instead of release-X.Y.x-maint (#3995)

We will be updating our release procedure to be more "normal" or "sane".
We will
- create release branches like normal people
- land cherry-picks onto those branches
- run releases off of those branches
- no more "rc" branch pollution either

Given that, this PR cleans things up a bit
- Remove `-maint` suffix from release branch patterns in CI workflows
- Update branch matching to `release-X.Y.x` format

.github/workflows/pre-commit.yml

@@ -7,7 +7,9 @@ on:
   push:
     branches:
       - main
-      - 'release-[0-9]+.[0-9]+.x-maint'
+      - 'release-[0-9]+.[0-9]+.[0-9]+.[0-9]+'
+      - 'release-[0-9]+.[0-9]+.[0-9]+'
+      - 'release-[0-9]+.[0-9]+'
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref == 'refs/heads/main' && github.run_id || github.ref }}