sqlite: fix missing Commit() in RemovePodContainers()

We have to Commit() the transaction. Note this is only in a rare pod
remove code path and very unlikely to ever be used.

[NO NEW TESTS NEEDED]

Signed-off-by: Paul Holzinger <pholzing@redhat.com>

libpod/sqlite_state.go

@@ -1697,6 +1697,10 @@ func (s *SQLiteState) RemovePodContainers(pod *Pod) (defErr error) {
 		return err
 	}
 
+	if err := tx.Commit(); err != nil {
+		return fmt.Errorf("committing pod containers %s removal transaction: %w", pod.ID(), err)
+	}
+
 	return nil
 }