Skip tests.observability.metrics.test_virt_resource_mutation_metrics.test_metric_invalid_change in favor of test_metric_multiple_invalid_change which provides same HCO mutation metric coverage plus alert verification. Reduces CI noise while maintaining observability testing.

Benefits:

• Reduces CI noise (50% fewer failures for same systemic issues)
• Maintains equivalent functional coverage
• Improves test suite efficiency

The multiple change test inherently validates single change work (if 5 mutations increment the metric by 5, then 1 mutation must work), while also testing alert generation which the simple test doesn't cover.