DAOS-13997 control: Allow labels for fault domain levels

[kjacque]

This patch allows the fault domain levels defined in the server config file to be assigned human-readable labels, for example: /cluster=wolf/rack=123/node=wolf-45

• Continue allowing fully unlabeled fault paths.
• Record the domain labels as a management property for the first rank to join. Labels cannot be changed once set.
• All ranks joining the system must have the same labels.
• If any domain levels have a label, all of them must. For example, /cluster=wolf/wolf-45 would not be allowed.

Required-githooks: true

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• Any tests skipped by the ticket being addressed have been run and passed in the PR.

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• If applicable, the PR has addressed any potential version compatibility issues.
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• Extra checks if forced landing is requested
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  • Quick-build or Quick-functional is not used.
• Fix the commit message upon landing. Check the standard here. Edit it to create a single commit. If necessary, ask submitter for a new summary.

[github-actions]

Ticket title is 'New fault_path format support'
Status is 'In Progress'
https://daosio.atlassian.net/browse/DAOS-13997

[daosbuild1]

Test stage Unit Test on EL 8.8 completed with status UNSTABLE. https://build.hpdd.intel.com/job/daos-stack/job/daos//view/change-requests/job/PR-15173/2/testReport/

[mjmac]

Code LGTM. Are there plans to add ftest coverage for this feature?

[kjacque]

Code LGTM. Are there plans to add ftest coverage for this feature?

We'll definitely need to add ftest coverage, although I think I'll need help from the validation team to test the more complex cases. There's no one on validation assigned to help with this feature yet.