Create new policy for Projects::BranchRules::MergeRequestApprovalSetting
<!--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=520015) </details> <!--IssueSummary end--> We need a new policy to handle the merge request approval settings. This should include settings for - `create_merge_request_approval_settings` - `read_merge_request_approval_settings` - `update_merge_request_approval_settings` - `delete_merge_request_approval_settings`
issue