fix: skip ephemeral volume topology requirements for bound pods during consolidation

[moko-poi]

Summary

• Fix for kubernetes-sigs/karpenter#2803: Ephemeral volumes with zone TopologySpreadConstraints block consolidation with Unconsolidatable events
• Skip ephemeral volume topology requirements when evaluating bound pods for consolidation, since ephemeral PVCs are deleted with the pod and a new PVC will be created on rescheduling
• Add unit tests for VolumeTopology.GetRequirements() covering bound/unbound pods with ephemeral/regular volumes
• Add consolidation integration test verifying replacement succeeds with ephemeral volumes and zone TSC

Test plan

• Unit tests: bound pod + ephemeral volume returns no topology requirements
• Unit tests: unbound pod + ephemeral volume returns topology requirements (unchanged behavior)
• Unit tests: bound pod + regular PVC returns topology requirements (unchanged behavior)
• Integration test: consolidation replaces node with ephemeral volumes and zone TSC
• Full scheduling test suite passes (339 tests)
• Full disruption test suite passes (233 tests)

[coveralls]

Pull Request Test Coverage Report for Build 22945641385

Details

• 7 of 7 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.009%) to 80.291%

---

Totals
Change from base Build 22943509809:	0.009%
Covered Lines:	12087
Relevant Lines:	15054

---

💛 - Coveralls