[ISSUE #9912] consumer offset timestamp displayed incorrect in tiered store

[woaishixiaoxiao]

Which Issue(s) This PR Fixes

Fixes #9912

Brief Description

How Did You Test This Change?

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 49.68%. Comparing base (89e021e) to head (d2cda52).

Files with missing lines	Patch %	Lines
...pache/rocketmq/tieredstore/TieredMessageStore.java	0.00%	1 Missing ⚠️

Additional details and impacted files

@@              Coverage Diff              @@
##             develop    #9913      +/-   ##
=============================================
- Coverage      49.78%   49.68%   -0.10%     
+ Complexity     12722    12691      -31     
=============================================
  Files           1314     1314              
  Lines          93928    93929       +1     
  Branches       12049    12049              
=============================================
- Hits           46765    46672      -93     
- Misses         41464    41534      +70     
- Partials        5699     5723      +24     

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