DAOS-18891 vos: debug patch for potential TX_RESTART during rebuild

[Nasf-Fan]

Only for test.

Test-tag: pr test_rebuild_31 test_rebuild_32
Skip-nlt: true
Skip-unit-test-memcheck: true
Skip-unit-tests: true
Skip-unit-test: true
Skip-checkpatch: 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 'osa/online_extend.py:OSAOnlineExtend.test_osa_online_extend_drain_after_rebuild - DER_TX_RESTART(-2025)'
Status is 'In Progress'
Labels: 'ci_master_weekly,weekly_test'
https://daosio.atlassian.net/browse/DAOS-18891