Enforce Merge Request branch workflow
<!--IssueSummary start--> <details> <summary> Everyone can contribute. [Help move this issue forward](https://handbook.gitlab.com/handbook/marketing/developer-relations/contributor-success/community-contributors-workflows/#contributor-links) while earning points, leveling up and collecting rewards. </summary> - [Close this issue](https://contributors.gitlab.com/manage-issue?action=close&projectId=278964&issueIid=533350) </details> <!--IssueSummary end--> <!--This template is a great use for issues that are feature::additions or technical tasks for larger issues.--> ### Description Currently, Merge Request branch workflow doesn't prevent creating an MR from unwanted branches to the target branch. For example, I have the following: \*\*Branch name pattern "\*\*develop/\*" redirect to **Target branch** "main" **Branch name pattern** "feature/\*" redirect to **Target branch** "develop" Then, as a Developer, I create an MR from feature-1, the MR defaults the target to "develop" branch, but I can easily change that target to "main" again. ### Proposal Make this redirection enforced for certain roles. <!--Use this section to explain the feature and how it will work. It can be helpful to add technical details, design proposals, and links to related epics or issues.--> <!--Consider adding related issues and epics to this issue. You can also reference the Feature Proposal Template (https://gitlab.com/gitlab-org/gitlab/-/blob/master/.gitlab/issue_templates/Feature%20proposal%20-%20detailed.md) for additional details to consider adding to this issue. Additionally, as a data oriented organization, when your feature exits planning breakdown, consider adding the `What does success look like, and how can we measure that?` section.--> <!--Label reminders Use the following resources to find the appropriate labels: - Use only one tier label choosing the lowest tier this is intended for - https://gitlab.com/gitlab-org/gitlab/-/labels - https://about.gitlab.com/handbook/product/categories/features/-->
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