[ISSUE #9271] Enhance tiered storage getQueueOffsetByTimeAsync

[bxfjb]

Which Issue(s) This PR Fixes

Fixes #9271

Brief Description

How Did You Test This Change?

[codecov-commenter]

Codecov Report

❌ Patch coverage is 53.33333% with 7 lines in your changes missing coverage. Please review.
✅ Project coverage is 48.02%. Comparing base (34c32d8) to head (cd5df2d).
⚠️ Report is 295 commits behind head on develop.

Files with missing lines	Patch %	Lines
...che/rocketmq/tieredstore/file/FlatMessageFile.java	53.33%	5 Missing and 2 partials ⚠️

Additional details and impacted files

@@              Coverage Diff              @@
##             develop    #9272      +/-   ##
=============================================
- Coverage      48.16%   48.02%   -0.14%     
+ Complexity     12124    12092      -32     
=============================================
  Files           1322     1322              
  Lines          93126    93139      +13     
  Branches       11940    11943       +3     
=============================================
- Hits           44850    44727     -123     
- Misses         42738    42861     +123     
- Partials        5538     5551      +13     

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