Feedback: User-level persistent secrets
<!--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=500362) </details> <!--IssueSummary end--> This issue is to capture any interest or discussion around this feedback. Spawned from discussion here: https://gitlab.com/gitlab-org/gitlab/-/issues/497305#note_2161762374 As a user, I'd like to inject secrets into my workspace at a non-agent level
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