[gitlab-ci] automate toolforge-deploy merge request
Done:
- create the gitlab-ci file to automatically create a toolforge-deploy merge request on new releases.
- create a project access token with the right scopes on toolforge-deploy repo.
- copy the token created and save in the toolforge group as gitlab CI/CD protected and masked variable named TOOLFORGE_DEPLOY_ACCESS_TOKEN.
Bug: T347392 Signed-off-by: Ndibe Raymond Olisaemeka rolisaemeka-ctr@wikimedia.org