Use rockcraft from latest/edge channel

.github/workflows/integration_test.yaml

@@ -15,7 +15,6 @@ jobs:
       pre-run-script: localstack-installation.sh
       charmcraft-channel: latest/edge
       modules: '["test_charm.py", "test_cos.py", "test_database.py", "test_db_migration.py", "test_django.py", "test_django_integrations.py", "test_fastapi.py", "test_go.py", "test_integrations.py", "test_proxy.py"]'
-      rockcraft-repository: javierdelapuente/rockcraft
-      rockcraft-ref: fastapi-extension
+      rockcraft-channel: latest/edge
       juju-channel: ${{ matrix.juju-version }}
       channel: 1.29-strict/stable