Internal release: Version file on GitLab repo is updated multiple times

Today, while testing the creation of an internal package, the job that triggered the InternalRelease::Release service was tried. This caused the VERSION file on the GitLab repo to be updated multiple times:

https://dev.gitlab.org/gitlab/gitlab-ee/-/commits/17-7-stable-ee?ref_type=heads

The job needs to be adjusted to be idempotent: Only update the VERSION file once regardless if the service is triggered multiple times for the same version

Exit Criteria

• No commit is made to the VERSION file if it already has the intended internal release version