Migrate the Server Foundation Multi-hub SD (Service Delivery) pipeline to use Kubernetes agents.

Objective:
Enable better resource utilization and eliminate workspace cleanup issues for Multi-hub SD pipeline.

Scope:
- Update Multi-hub SD pipeline configuration to use Kubernetes agents
- Test multi-hub scenarios with K8s agent setup
- Verify workspace cleanup improvements
- Ensure multi-hub functionality remains intact

Acceptance Criteria:
- [ ] Multi-hub SD pipeline successfully migrated to K8s agents
- [ ] Multi-hub scenarios verified with K8s agent configuration
- [ ] Workspace cleanup issues resolved
- [ ] Multi-hub functionality validated post-migration
- [ ] Performance and resource utilization improved

Dependencies:
- K8s agent configuration established
- Access to Multi-hub SD pipeline systems

This task was created as part of Epic breakdown for ACM-26264. Generated by Claude Code.