[ISSUE #9881]Increase timeout for broker notification requests to 3000 milliseconds

[mxsm]

Which Issue(s) This PR Fixes

Fixes #9881

Brief Description

How Did You Test This Change?

[mxsm]

@RongtongJin cc

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 48.28%. Comparing base (5892de6) to head (0a3aa94).
⚠️ Report is 7 commits behind head on develop.

Files with missing lines	Patch %	Lines
...e/rocketmq/namesrv/routeinfo/RouteInfoManager.java	0.00%	1 Missing ⚠️

Additional details and impacted files

@@              Coverage Diff              @@
##             develop    #9882      +/-   ##
=============================================
- Coverage      48.40%   48.28%   -0.12%     
+ Complexity     12288    12257      -31     
=============================================
  Files           1314     1314              
  Lines          93890    93903      +13     
  Branches       12044    12046       +2     
=============================================
- Hits           45449    45343     -106     
- Misses         42834    42931      +97     
- Partials        5607     5629      +22     

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