DAOS-18778 test: Use ucx for Functional HW stages - only for test

[Nasf-Fan]

Change the default provider to ucx+dc_x for the functional hardware non-provider stages. Make the Functional Hardware Medium UCX provider MD on SSD stage the new default provider stage.

Skip-nlt: true
Skip-unit-tests: true
Skip-fault-injection-test: true
Skip-func-test-el9: true

Steps for the author:

• Commit message follows the guidelines.
• Appropriate Features or Test-tag pragmas were used.
• Appropriate Functional Test Stages were run.
• At least two positive code reviews including at least one code owner from each category referenced in the PR.
• Testing is complete. If necessary, forced-landing label added and a reason added in a comment.

After all prior steps are complete:

• Gatekeeper requested (daos-gatekeeper added as a reviewer).

[github-actions]

Ticket title is 'Update functional testing to use ucx provider'
Status is 'In Progress'
Labels: 'testp1'
https://daosio.atlassian.net/browse/DAOS-18778

[daosbuild3]

Test stage Functional Hardware Medium MD on SSD completed with status FAILURE. https://jenkins-3.daos.hpc.amslabs.hpecorp.net//job/daos-stack/job/daos/view/change-requests/job/PR-18246/1/execution/node/815/log

[daosbuild3]

Test stage Functional Hardware Medium UCX Provider MD on SSD completed with status FAILURE. https://jenkins-3.daos.hpc.amslabs.hpecorp.net//job/daos-stack/job/daos/view/change-requests/job/PR-18246/1/execution/node/856/log

[daosbuild3]

Test stage Functional Hardware Large MD on SSD completed with status FAILURE. https://jenkins-3.daos.hpc.amslabs.hpecorp.net//job/daos-stack/job/daos/view/change-requests/job/PR-18246/1/execution/node/981/log