bugfix: fix the error when service.vgroupMapping change

[pengten]

• I have registered the PR changes.

Ⅰ. Describe what this PR did

修复运行中修改 service.vgroupMapping 导致请求仍然流向旧集群的问题。
Fixed an issue where modifying service.vgroupMapping on-the-fly caused requests to still flow to the old cluster.

Ⅱ. Does this pull request fix one issue?

fixes #4470

Ⅲ. Why don't you add test cases (unit test/integration test)?

Ⅳ. Describe how to verify it

Ⅴ. Special notes for reviews

[codecov-commenter]

Codecov Report

Merging #4471 (6a801a5) into develop (193a112) will decrease coverage by 0.10%.
The diff coverage is 50.00%.

@@              Coverage Diff              @@
##             develop    #4471      +/-   ##
=============================================
- Coverage      49.09%   48.98%   -0.11%     
+ Complexity      4032     4029       -3     
=============================================
  Files            730      730              
  Lines          25278    25279       +1     
  Branches        3126     3126              
=============================================
- Hits           12411    12384      -27     
- Misses         11545    11576      +31     
+ Partials        1322     1319       -3     

Impacted Files	Coverage Δ
...eata/core/rpc/netty/NettyClientChannelManager.java	66.41% <50.00%> (-5.13%)	⬇️
...er/src/main/java/io/seata/server/ServerRunner.java	50.00% <0.00%> (-15.39%)	⬇️
...o/seata/server/coordinator/DefaultCoordinator.java	50.71% <0.00%> (-6.12%)	⬇️
...erver/storage/file/session/FileSessionManager.java	53.59% <0.00%> (-0.66%)	⬇️
.../java/io/seata/spring/util/TCCBeanParserUtils.java	32.25% <0.00%> (+1.61%)	⬆️

[funky-eyes]

LGTM

[slievrly]

LGTM

[slievrly]

LGTM