[ISSUE #8322]Fix Slave redirect pullRequest to master will never execute

[mxsm]

Which Issue(s) This PR Fixes

Fixes #8322

Brief Description

How Did You Test This Change?

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 10 lines in your changes missing coverage. Please review.

Project coverage is 42.98%. Comparing base (2091843) to head (548b1a4).

Files	Patch %	Lines
...ocketmq/broker/processor/PullMessageProcessor.java	0.00%	10 Missing ⚠️

Additional details and impacted files

@@              Coverage Diff              @@
##             develop    #8323      +/-   ##
=============================================
+ Coverage      42.95%   42.98%   +0.02%     
- Complexity     10456    10458       +2     
=============================================
  Files           1274     1274              
  Lines          88940    88939       -1     
  Branches       11434    11433       -1     
=============================================
+ Hits           38204    38230      +26     
+ Misses         46027    45996      -31     
- Partials        4709     4713       +4     

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[drpmma]

LGTM