[ISSUE #8426]Fix when SendMessage asyncSendEnable is false will write response twice

[mxsm]

Which Issue(s) This PR Fixes

Fixes #8426

Brief Description

How Did You Test This Change?

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 5 lines in your changes missing coverage. Please review.

Project coverage is 45.37%. Comparing base (86d59d2) to head (c0980e8).

Files	Patch %	Lines
...ocketmq/broker/processor/SendMessageProcessor.java	0.00%	5 Missing ⚠️

Additional details and impacted files

@@              Coverage Diff              @@
##             develop    #8427      +/-   ##
=============================================
- Coverage      45.37%   45.37%   -0.01%     
- Complexity     10993    10997       +4     
=============================================
  Files           1274     1274              
  Lines          88993    88994       +1     
  Branches       11439    11439              
=============================================
- Hits           40385    40384       -1     
- Misses         43577    43580       +3     
+ Partials        5031     5030       -1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.