Test-operator doesn't have kuttl tests like other openstack-operators. To strengthen testing and prevent regression, let's first add basic kuttl tests to test-operator.

I consulted Claude what could be part of this ticket, but it might be subject to change when practical implementation is in progress. These are the goals for now:

• Set up kuttl test framework in the repository
• Create test harness and helper scripts
• Add Makefile targets for running kuttl tests
• Document kuttl test structure and conventions
• Create mock/sample OpenStack configs, secrets for testing

The second part is for common test utilities and fixtures:

• Create reusable kuttl test assertions
• Build common test fixtures (ConfigMaps, Secrets, NetworkAttachmentDefinitions)
• Create helper scripts for verifying pod states
• Establish test naming conventions