Explicitly define dependency instance - trunk port

[hjensas]

Seeing some races related to trunk ports, KCS6995100 suggests adding explicit dependency between the instance and the trunk port.

[1] https://access.redhat.com/solutions/6995100

Assisted-By: Claude (claude-4.5-sonnet)

[softwarefactory-project-zuul]

Experimental Build Failed (github-experimental pipeline).

https://softwarefactory-project.io/zuul/t/rdoproject.org/buildset/48056053bb6045998186581331f929d2

❌ vexxhost-hotstack-sno-2-bm FAILURE in 1h 15m 06s
❌ vexxhost-hotstack-3-nodes FAILURE in 1h 21m 24s
❌ vexxhost-hotstack-3-nodes-update FAILURE in 57m 32s
✔️ vexxhost-hotstack-multi-nodeset SUCCESS in 1h 53m 08s

[softwarefactory-project-zuul]

Experimental Build Failed (github-experimental pipeline).

https://softwarefactory-project.io/zuul/t/rdoproject.org/buildset/240928ecc2db41a2be2ccfe188a49ea8

❌ vexxhost-hotstack-sno-2-bm FAILURE in 1h 28m 17s
❌ vexxhost-hotstack-3-nodes FAILURE in 1h 36m 06s
❌ vexxhost-hotstack-3-nodes-update FAILURE in 57m 09s
❌ vexxhost-hotstack-multi-nodeset FAILURE in 2h 22m 46s

[softwarefactory-project-zuul]

Experimental Build Failed (github-experimental pipeline).

https://softwarefactory-project.io/zuul/t/rdoproject.org/buildset/10f9a147a10a447bae9e23eabaf13638

❌ vexxhost-hotstack-sno-2-bm FAILURE in 1h 32m 04s
❌ vexxhost-hotstack-3-nodes FAILURE in 1h 34m 35s
❌ vexxhost-hotstack-3-nodes-update FAILURE in 54m 09s
❌ vexxhost-hotstack-multi-nodeset FAILURE in 2h 31m 40s