[ISSUE #7545] [RIP-65] Support efficient random index for massive messages

[lizhimins]

…sages

Which Issue(s) This PR Fixes

Support #7545

Brief Description

How Did You Test This Change?

[guyinyou]

lgtm

[joeCarf]

lgtm

[codecov-commenter]

Codecov Report

Attention: 171 lines in your changes are missing coverage. Please review.

Comparison is base (46962c2) 42.97% compared to head (a1afabe) 43.22%.
Report is 10 commits behind head on develop.

Files	Patch %	Lines
...che/rocketmq/tieredstore/index/IndexStoreFile.java	77.50%	35 Missing and 19 partials ⚠️
.../rocketmq/tieredstore/index/IndexStoreService.java	74.86%	32 Missing and 14 partials ⚠️
...che/rocketmq/tieredstore/TieredMessageFetcher.java	0.00%	28 Missing ⚠️
...main/java/org/apache/rocketmq/store/CommitLog.java	59.09%	7 Missing and 11 partials ⚠️
...a/org/apache/rocketmq/store/MessageExtEncoder.java	78.26%	3 Missing and 7 partials ⚠️
.../java/org/apache/rocketmq/store/MultiDispatch.java	87.09%	0 Missing and 4 partials ⚠️
...rocketmq/common/message/MessageExtBrokerInner.java	25.00%	3 Missing ⚠️
...org/apache/rocketmq/common/utils/MessageUtils.java	88.00%	0 Missing and 3 partials ⚠️
...cketmq/tieredstore/file/TieredFlatFileManager.java	72.72%	1 Missing and 2 partials ⚠️
...pache/rocketmq/store/queue/MultiDispatchUtils.java	0.00%	1 Missing ⚠️
... and 1 more

Additional details and impacted files

@@              Coverage Diff              @@
##             develop    #7546      +/-   ##
=============================================
+ Coverage      42.97%   43.22%   +0.25%     
- Complexity      9677     9781     +104     
=============================================
  Files           1158     1162       +4     
  Lines          83987    84223     +236     
  Branches       10917    10933      +16     
=============================================
+ Hits           36093    36408     +315     
+ Misses         43399    43297     -102     
- Partials        4495     4518      +23     

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