raftstore: allow DrAutoSync to majority commit log during SyncRecover phase (#15103)

[ti-chi-bot]

This is an automated cherry-pick of #15103

What is changed and how it works?

Issue Number: Close #14975

What's Changed:

raftstore: do not enable group commit when replication mode is SyncRecover
- during DR mode, the SyncRecover state should be committed in majority mode. otherwise, the qps may drop

After this change, the SyncRecover phase will not enable group commits at first, once the dr replicas catch up the logs, then enable the group commits. the region will report as INTEGRITY_OVER_LABEL after catching up on the logs, after all, region is in the INTEGRITY_OVER_LABEL state, PD will switch the state SyncRecover top Sync state.

Check List

Tests

• Unit test
• Integration test

fix the QPS drop to zero in dr SyncRecovery phase in DR mode

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• Connor1996
• v01dstar

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[nolouch]

/cherry-pick-invite

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[nolouch]

/retest

[Connor1996]

LGTM

[v01dstar]

LGTM

[nolouch]

/test

[Connor1996]

/merge

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[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: 8fbd54c