Source code rules - Move Merge request options to source code rules
<!--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=357575) </details> <!--IssueSummary end--> ### Problem to solve Once https://gitlab.com/gitlab-org/gitlab/-/issues/351468 is implemented, it might make sense to move additional features under source code rules and allow them to be managed on a per branch basis. This issue is to investigate Merge request options. - Merge method/Squash commits when merging - Merge options Note: [Status checks](https://gitlab.com/gitlab-org/gitlab/-/issues/357572) and [Merge checks](https://gitlab.com/gitlab-org/gitlab/-/issues/357571) have their own issues ![image](/uploads/01aed976234d47017cde53931997f654/image.png) ### Proposal - Determine if there is value in managing Merge options on a per branch basis - Define a section within branch rules to manage Merge options
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