Add new kwok-compute-domain-dra-plugin component that creates ResourceSlices
for compute domain channels on KWOK simulated nodes.

Key changes:
- New internal/kwok-compute-domain-dra-plugin package with Node controller
- Controller watches nodes with label type=kwok or annotation kwok.x-k8s.io/node=fake
- Creates ResourceSlice named kwok-<node>-compute-domain-channel for each KWOK node
- ResourceSlice contains channel-0 device for compute domain allocation
- New cmd/kwok-compute-domain-dra-plugin entrypoint
- Updated Dockerfile and Makefile to build new component

Add new Helm values block for KWOK compute-domain DRA plugin:
- kwokComputeDomainDraPlugin.enabled (default: false)
- image configuration
- resource requests/limits

Add Helm templates for KWOK compute-domain DRA plugin deployment:
- deployment.yaml: single replica Deployment with no host volumes
- serviceaccount.yaml: dedicated service account
- clusterrole.yaml: permissions for nodes and resourceslices
- clusterrolebinding.yaml: binds role to service account

All templates gated by kwokComputeDomainDraPlugin.enabled flag.

Update integration test harness:
- Enable kwokComputeDomainDraPlugin in values.yaml
- Load kwok-compute-domain-dra-plugin image into kind cluster
- Pass image tag to helm install
- Wait for kwok-compute-domain-dra-plugin deployment readiness

Add integration tests for compute-domain on KWOK nodes:
- Test manifest: compute-domain-kwok-pod.yaml with ComputeDomain CR and
  Pod targeting KWOK node with nodeSelector and tolerations
- Test: ResourceSlice created for KWOK nodes with compute-domain channels
- Test: Pod scheduled on KWOK node can allocate compute-domain claim
- Test: ComputeDomain status updated to Ready with KWOK node listed

replace log with klog for structured logging

…claim-template-name

fix: compute domain template name

compute domain plugin for KWOK nodes