[ISSUE #7878] Performance Improvement and Bug Fixes for the Tiered Storage Module

[lizhimins]

Which Issue(s) This PR Fixes

Fixes #7878

Brief Description

How Did You Test This Change?

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 84.27720% with 211 lines in your changes are missing coverage. Please review.

Project coverage is 43.08%. Comparing base (333c545) to head (79278eb).
Report is 1 commits behind head on develop.

Files	Patch %	Lines
...etmq/tieredstore/core/MessageStoreFetcherImpl.java	77.92%	39 Missing and 12 partials ⚠️
...q/tieredstore/core/MessageStoreDispatcherImpl.java	70.54%	24 Missing and 19 partials ⚠️
...pache/rocketmq/tieredstore/TieredMessageStore.java	70.78%	9 Missing and 17 partials ⚠️
...che/rocketmq/tieredstore/file/FlatMessageFile.java	88.88%	7 Missing and 10 partials ⚠️
.../rocketmq/tieredstore/index/IndexStoreService.java	72.54%	7 Missing and 7 partials ⚠️
...tieredstore/metrics/TieredStoreMetricsManager.java	18.75%	13 Missing ⚠️
...ache/rocketmq/tieredstore/file/FlatAppendFile.java	91.33%	5 Missing and 6 partials ⚠️
...pache/rocketmq/tieredstore/file/FlatFileStore.java	85.71%	9 Missing and 2 partials ⚠️
...ocketmq/tieredstore/provider/PosixFileSegment.java	85.96%	4 Missing and 4 partials ⚠️
...pache/rocketmq/tieredstore/MessageStoreConfig.java	90.32%	3 Missing ⚠️
... and 8 more

Additional details and impacted files

@@              Coverage Diff              @@
##             develop    #7899      +/-   ##
=============================================
+ Coverage      42.93%   43.08%   +0.15%     
+ Complexity      9909     9856      -53     
=============================================
  Files           1190     1184       -6     
  Lines          86042    85187     -855     
  Branches       11081    10978     -103     
=============================================
- Hits           36938    36703     -235     
+ Misses         44527    43997     -530     
+ Partials        4577     4487      -90     

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[lollipopjin]

LGTM