SAST VR - Backend - Rename custom ability to give it a more generic name
## TL;DR We created a custom ability in https://gitlab.com/gitlab-org/gitlab/-/work_items/599602 (see: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/235831). We called it `update_sast_vr_setting`. We eventually want to have the same ability for all AI workflows (from sec), and making the name more generic now to be re-used in the future will safe us work eventually. ## Acceptance Criteria - [ ] Specific, testable criterion 1 - [ ] Specific, testable criterion 2 ## Implementation Details Technical specifics e.g. files to change, functions, API endpoints, or data model updates. ## Testing Approach - [ ] Unit tests - [ ] Integration tests - [ ] Manual validation steps ## Estimate
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