[ISSUE #8512] TimerMessageStore#getDequeueTps optimization

[847850277]

Which Issue(s) This PR Fixes

Fixes #8512

Brief Description

How Did You Test This Change?

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 47.33%. Comparing base (daf3d1a) to head (f6bfa38).

Files with missing lines	Patch %	Lines
...apache/rocketmq/store/timer/TimerMessageStore.java	0.00%	1 Missing ⚠️

Additional details and impacted files

@@              Coverage Diff              @@
##             develop    #8513      +/-   ##
=============================================
- Coverage      47.50%   47.33%   -0.17%     
+ Complexity     11588    11547      -41     
=============================================
  Files           1282     1282              
  Lines          89848    89848              
  Branches       11557    11557              
=============================================
- Hits           42683    42531     -152     
- Misses         41937    42073     +136     
- Partials        5228     5244      +16     

Flag	Coverage Δ
	47.33% <0.00%> (-0.17%)	⬇️

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