Move Kubernetes and Prometheus integration to Settings -> Operations
<!--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=28521) </details> <!--IssueSummary end--> ### Problem to solve Make "operations" (Sentry, Kubernetes, Prometheus, etc) integrations all configurable from the same place. ### Intended users Developer ### Further details Make it easier to find operation integration settings and configuration. ### Proposal Move the Kubernetes and Prometheus integration settings from "Settings -> Integrations" to ""Settings -> Operations". The "Operations" menu contains Metrics, Environments, Error Tracking, Serverless and Kubernetes. If I go to "Settings -> Operations", I assume that I could configure all of these services, but I can only configure "Error Tracking" ### Permissions and Security N/A ### Documentation Update documentation with the integrations mentioned. ### Testing Not sure ### What does success look like, and how can we measure that? Moved menu items. ### Links / references
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