ms/tso: move startGlobalAllocatorLoop outside NewAllocatorManager

[okJiang]

What problem does this PR solve?

Issue Number: Ref #4399

ms/tso: move startGlobalAllocatorLoop outside NewAllocatorManager

We call startGlobalAllocatorLoop where we need it. We only need it when setting API mode and TSO server start.

What is changed and how does it work?

Check List

Tests

• Unit test
• Integration test

Release note

None.

[codecov]

Codecov Report

Attention: Patch coverage is 66.66667% with 5 lines in your changes missing coverage. Please review.

Project coverage is 70.02%. Comparing base (003def6) to head (991346b).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #8725      +/-   ##
==========================================
+ Coverage   69.98%   70.02%   +0.03%     
==========================================
  Files         517      517              
  Lines       79947    79953       +6     
==========================================
+ Hits        55953    55987      +34     
+ Misses      20433    20404      -29     
- Partials     3561     3562       +1     

Flag	Coverage Δ
unittests	70.02% <66.66%> (+0.03%)	⬆️

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[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: lhy1024, rleungx

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-10-21 09:11:14.970178462 +0000 UTC m=+255875.666969064: ☑️ agreed by rleungx.
• 2024-10-22 03:44:41.736292498 +0000 UTC m=+322682.433083106: ☑️ agreed by lhy1024.

[ti-chi-bot]

@okJiang: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-integration-realcluster-test	991346b	link	false	/test pull-integration-realcluster-test

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