Add option to uninstall app with no-backup check

Sometimes while uninstalling the app from site could result in failure due to connection reset error.
```
pymysql.err.OperationalError: (2006, "MySQL server has gone away (ConnectionResetError(104, 'Connection reset by peer'))")
```

Option to remove app with no-backup would resolve the issue.

Start from the site’s app-uninstall flow and investigate the reported MySQL OperationalError caused by a connection reset. Determine how an uninstall option with no backup should behave, then verify that the app can be removed successfully without triggering the backup path.

Written by the indexing model from the issue text.