Migrate navigator.clipboard in Repository - Blob Content Viewer
## File
`app/assets/javascripts/repository/components/blob_content_viewer.vue`
## Current Usage
```javascript
// eslint-disable-next-line no-restricted-properties
navigator.clipboard.writeText(this.blobInfo.rawTextBlob);
```
## Migration Task
Replace `navigator.clipboard.writeText()` with `copyToClipboard()` from `~/lib/utils/copy_to_clipboard`.
## Related
- Epic: &19827
- MR: !211222
issue