[ISSUE 3932] refactor MotanServiceEventListener

[misaya295]

Make sure that:

• You have read the contribution guidelines.
• You submit test cases (unit or integration tests) that back your changes.
• Your local test passed ./mvnw clean install -Dmaven.javadoc.skip=true.

[codecov-commenter]

Codecov Report

Merging #3957 (56e2479) into master (14ec556) will decrease coverage by 0.02%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master    #3957      +/-   ##
============================================
- Coverage     70.16%   70.13%   -0.03%     
+ Complexity     6678     6674       -4     
============================================
  Files           923      923              
  Lines         25071    25071              
  Branches       2264     2264              
============================================
- Hits          17590    17583       -7     
- Misses         6112     6117       +5     
- Partials       1369     1371       +2     

Impacted Files	Coverage Δ
...controller/ShenyuClientHttpRegistryController.java	77.77% <0.00%> (-22.23%)	⬇️
...ruptor/RegisterClientServerDisruptorPublisher.java	52.94% <0.00%> (-11.77%)	⬇️
...henyu/admin/service/impl/UpstreamCheckService.java	62.66% <0.00%> (-1.34%)	⬇️
...henyu/plugin/grpc/resolver/ShenyuNameResolver.java	62.76% <0.00%> (-1.07%)	⬇️

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[loongs-zhang]

please check CI.