Replace Molecule OPNsense component placeholder assertions with real tests

User Story:

As a developer, I want real test assertions for OPNsense component so that OPNsense operator functionality is validated

Problem Statement:

OPNsense component tests don't validate firewall rules, network policies, or VPN configurations deployed by the operator.

Acceptance Criteria:

• OPNsense CRD creation validated with proper configuration
• Firewall rules deployment verified
• Network interface configuration tested
• VLAN tagging and routing validated
• API connectivity to OPNsense confirmed.
• Configuration backup and restore tested
• Idempotency verified (no changes on second run)

Implementation Details:

Files to Modify:

• molecule/default/tasks/opnsense_test.yml - Replace placeholder assertions with real tests
• molecule/default/vars/opnsense_test_vars.yml - Test configurations for firewall scenarios

Dependencies:

• requests library for OPNsense API testing
• kubernetes Python client.

Additional Notes:

Validate firewall API access, verify rule application, check network segmentation (Management: 10.2X.100.0/24, IPMI: 10.23.100.0/24, K8s: 10.22.100.0/24), and test configuration persistence.

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