refator(backend-common): extract path utilities to plugin api

Signed-off-by: Camila Belo <camilaibs@gmail.com>

plugins/notifications-backend/src/database/DatabaseNotificationsStore.ts

@@ -13,10 +13,8 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-import {
-  PluginDatabaseManager,
-  resolvePackagePath,
-} from '@backstage/backend-common';
+import { PluginDatabaseManager } from '@backstage/backend-common';
+import { resolvePackagePath } from '@backstage/backend-plugin-api';
 import {
   NotificationGetOptions,
   NotificationModifyOptions,