DAOS-16469 dtx: properly handle DTX partial commit - b26

[Nasf-Fan]

When a DTX leader globally commit the DTX, it is possible that some DTX participant(s) cannot commit such DTX entry because of kinds of issues, such as network or space trouble. Under such case, the DTX leader needs to keep the active DTX entry persistently for further commit/resync. But it does not means related modification attched to such DTX entry on the leader target cannot be committed, instead, we can commit related modification with only keeping the DTX header. That is enough for the DTX leader to do further DTX commit/resync to handle related former failed DTX participant(s).

The benefit is that VOS aggregation on the leader target will not be affected by remote DTX commit failure.

Allow-unstable-test: true

Before requesting gatekeeper:

• Two review approvals and any prior change requests have been resolved.
• Testing is complete and all tests passed or there is a reason documented in the PR why it should be force landed and forced-landing tag is set.
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• Any tests skipped by the ticket being addressed have been run and passed in the PR.

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[github-actions]

Ticket title is 'IOR Easy performance low with EC_16P2GX'
Status is 'In Progress'
Labels: 'daos_ecb_scale,pre_acceptance_issues'
Job should run at elevated priority (1)
https://daosio.atlassian.net/browse/DAOS-16469

[daosbuild1]

Test stage Functional Hardware Medium Verbs Provider completed with status FAILURE. https://build.hpdd.intel.com//job/daos-stack/job/daos/view/change-requests/job/PR-15399/1/execution/node/1565/log