Add rake task to help generate preparation MRs
What
- Creates
bundle exec rake "patch_merge_request[X.Y.Z]"
rake task to create a merge request from the preparation_merge_request.md.erb template - Currently based on the https://gitlab.com/gitlab-org/release-tools/merge_requests/162 branch, but needs rebasing once that merges as well as to work with updated code
- Updates instructions in picking-into-merge-requests.md as well as in monthly and patch templates.
Why
Copying previous descriptions and updating branch names / repos was tedious, this automates generating the description and can be extended to create the MRs automatically.
Related
Closes https://gitlab.com/gitlab-org/release-tools/issues/98
Edited by James EJ