DAOS-19358 control: Fix dmg system erase for MD-on-SSD

[tanabarr]

Features: control

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 'Fix dmg system erase for MD-on-SSD '
Status is 'In Progress'
https://daosio.atlassian.net/browse/DAOS-19358

[daosbuild3]

Test stage Build on EL 9 completed with status FAILURE. https://jenkins-3.daos.hpc.amslabs.hpecorp.net//job/daos-stack/job/daos/view/change-requests/job/PR-18718/1/execution/node/521/log

[daosbuild3]

Test stage Build on Leap 15 completed with status FAILURE. https://jenkins-3.daos.hpc.amslabs.hpecorp.net//job/daos-stack/job/daos/view/change-requests/job/PR-18718/1/execution/node/569/log