optimize shenyu-admin

[balloon72]

optimize code

[KevinClair]

Resolve conflicts.

[balloon72]

Resolve conflicts.

rebased

[codecov-commenter]

Codecov Report

Merging #4355 (257bb16) into master (50371b6) will increase coverage by 0.01%.
The diff coverage is 42.85%.

@@             Coverage Diff              @@
##             master    #4355      +/-   ##
============================================
+ Coverage     68.29%   68.31%   +0.01%     
  Complexity     7502     7502              
============================================
  Files          1020     1020              
  Lines         28806    28799       -7     
  Branches       2569     2569              
============================================
- Hits          19674    19673       -1     
+ Misses         7596     7590       -6     
  Partials       1536     1536              

Impacted Files	Coverage Δ
...he/shenyu/admin/controller/PlatformController.java	83.33% <0.00%> (ø)
...enyu/admin/service/impl/PermissionServiceImpl.java	34.61% <0.00%> (ø)
.../shenyu/admin/service/impl/SandboxServiceImpl.java	8.33% <0.00%> (+0.13%)	⬆️
...henyu/admin/service/impl/UpstreamCheckService.java	62.41% <ø> (-0.26%)	⬇️
...nyu/admin/service/manager/impl/DocManagerImpl.java	16.66% <0.00%> (+1.66%)	⬆️
...che/shenyu/admin/spring/LocalDataSourceLoader.java	68.57% <0.00%> (ø)
...shenyu/admin/service/impl/SyncDataServiceImpl.java	96.42% <83.33%> (+3.32%)	⬆️
.../register/FallbackShenyuClientRegisterService.java	11.11% <100.00%> (ø)

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