Implement test cases for ODLM no olm controller

[YCShen1010]

What this PR does / why we need it: Implement test cases for ODLM no olm controller:

1. Setup test environment with fake client
2. Create test fixtures for OperandRequest objects
3. Test the main reconcile logic
4. Test permission checking
5. Test finalizer handling

[ibm-ci-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: YCShen1010

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