Issue Ownership code mappings cannot be differentiated in dropdown

### Environment

SaaS (https://sentry.io/)

### Steps to Reproduce

1. Have multiple code mappings for a project
2. Go to the Ownership Rules page
3. Click IMPORT CODEOWNERS
4. Click Apply an existing code mapping and click the dropdown

### Expected Result

Ideally, there should be some kind of label to show the user which code mapping they are applying

### Actual Result

All code mappings are labelled with the repo name and cannot be differentiated


### Product Area

Issues

### Link

_No response_

### DSN

_No response_

### Version

_No response_