[release-new] fix: release pr commit contains `(#number)` at last (#79611)
When the "Version Packages" PR is merged, the created commit is the
format of "Version Packages (#number)". Therefore, the
check-is-release.js script won't match the current regex. Also, I
modified the workflows that use the `check-is-release.js` to consider
the new release as a release workflow as well.