[ISSUE #7328] Convergent thread pool creation

[guyinyou]

Convergence thread pool creation to facilitate subsequent iteration management

Which Issue(s) This PR Fixes

Fixes #7328

Brief Description

How Did You Test This Change?

[codecov-commenter]

Codecov Report

Merging #7329 (e5bcb49) into develop (6fd0073) will decrease coverage by 0.03%.
The diff coverage is 70.23%.

@@              Coverage Diff              @@
##             develop    #7329      +/-   ##
=============================================
- Coverage      42.65%   42.62%   -0.03%     
+ Complexity      9466     9455      -11     
=============================================
  Files           1152     1150       -2     
  Lines          82726    82714      -12     
  Branches       10780    10780              
=============================================
- Hits           35286    35259      -27     
- Misses         43028    43036       +8     
- Partials        4412     4419       +7     

Files Changed	Coverage Δ
...ketmq/broker/dledger/DLedgerRoleChangeHandler.java	0.00% <0.00%> (ø)
...rocketmq/common/config/AbstractRocksDBStorage.java	0.00% <0.00%> (ø)
...common/thread/FutureTaskExtThreadPoolExecutor.java	0.00% <ø> (ø)
...ache/rocketmq/common/thread/ThreadPoolMonitor.java	0.00% <0.00%> (ø)
.../org/apache/rocketmq/common/utils/ThreadUtils.java	0.00% <0.00%> (ø)
...ocketmq/proxy/remoting/RemotingProtocolServer.java	0.00% <0.00%> (ø)
.../rocketmq/proxy/service/ClusterServiceManager.java	0.00% <0.00%> (ø)
...he/rocketmq/proxy/service/LocalServiceManager.java	0.00% <0.00%> (ø)
...apache/rocketmq/store/queue/ConsumeQueueStore.java	47.63% <0.00%> (ø)
...n/java/org/apache/rocketmq/test/util/StatUtil.java	15.49% <ø> (ø)
... and 27 more

... and 16 files with indirect coverage changes

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