Feature Request: Introduce Code Ownership Conditions for Issue Alerts

### Problem Statement Our mono-repo's CODEOWNERS file is the source of truth when it comes to determining which team is responsible for an issue. The team assignment based on the CODEOWNERS file works well, but there is currently a gap when it comes to alerting: it is not yet possible to alert a team based on the code ownership of where the error occurred. We are currently solving this manually by replicating the team-ownership rules in our alert, e.g.: <img width="1045" height="393" alt="Image" src="https://github.com/user-attachments/assets/3c59a843-8ab6-46af-95de-30028abc79c5" /> This requires some manual effort for dozens of teams, but more importantly, it would soon get out of sync with the CODEOWNERS file. ### Solution Brainstorm This could be solved in Sentry by allowing _code ownership conditions_ like the following: <img width="917" height="105" alt="Image" src="https://github.com/user-attachments/assets/40c51547-3644-4815-9380-f88eb1f18a03" /> This logic is already used for assigning issues, but here it would be transferred to alerts. ### Product Area Alerts