[test_operator] Add pre-commit hook to auto-sync test_operator README

.pre-commit-config.yaml

@@ -45,3 +45,15 @@ repos:
         additional_dependencies:
           - netaddr
           - jmespath
+
+  # Sync test_operator README with defaults/main.yml
+  - repo: local
+    hooks:
+      - id: sync-test-operator-readme
+        name: Sync test_operator README
+        entry: python scripts/sync_test_operator_var_readme.py
+        language: python
+        files: ^roles/test_operator/defaults/main\.yml$
+        pass_filenames: false
+        additional_dependencies:
+          - PyYAML

roles/test_operator/README.md

@@ -16,7 +16,7 @@ Execute tests via the [test-operator](https://openstack-k8s-operators.github.io/
 * `cifmw_test_operator_default_image_tag`: (String) Default tag for all the supported test frameworks (tempest, tobiko, horizontest and ansibletest) to pull their container images. It can be overridden at test framework level.  Default value: `current-podified`
 * `cifmw_test_operator_default_jobs`: (List) List of jobs in the exclude list to search for tests to be excluded. Default value: See defaults in [main.yml](https://github.com/openstack-k8s-operators/ci-framework/blob/main/roles/test_operator/defaults/main.yml#L37)
 * `cifmw_test_operator_default_namespace`: (String) Default registry's namespace for all the supported test frameworks (tempest, tobiko, horizontest and ansibletest) to pull their container images. It can be overridden at test framework level.  Default value: `podified-antelope-centos9`
-* `cifmw_test_operator_default_registry`: (String) Default registry for all the supported test frameworks (tempest, tobiko, horizontest and ansibletest) to pull their container images. It can be overridden at test framework level.  Default value: `quay.io`
+* `cifmw_test_operator_default_registry`: (String) Default registry for all the supported test frameworks (tempest, tobiko, horizontest and ansibletest) to pull their container images. It can be overridden at test framework level.  Default value: `{{ cifmw_default_registry }}`
 * `cifmw_test_operator_delete_logs_pod`: (Boolean) Delete tempest log pod created by the role at the end of the testing. Default value: `false`.
 * `cifmw_test_operator_dry_run`: (Boolean) Whether test-operator should run or not. Default value: `false`
 * `cifmw_test_operator_fail_fast`: (Boolean) Whether the test results are evaluated when each test framework execution finishes or when all test frameworks are done. Default value: `false`