[type:refactor] refactor shenyu selector and rule cache

[moremind]

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 #4578 (df8abd5) into master (05f80fc) will decrease coverage by 0.02%.
The diff coverage is 54.41%.

@@             Coverage Diff              @@
##             master    #4578      +/-   ##
============================================
- Coverage     67.44%   67.42%   -0.02%     
- Complexity     7959     8000      +41     
============================================
  Files          1095     1096       +1     
  Lines         31296    31529     +233     
  Branches       2813     2859      +46     
============================================
+ Hits          21108    21260     +152     
- Misses         8531     8596      +65     
- Partials       1657     1673      +16     

Impacted Files	Coverage Δ
...apache/shenyu/admin/controller/RuleController.java	100.00% <ø> (ø)
...he/shenyu/admin/controller/SelectorController.java	100.00% <ø> (ø)
.../admin/model/event/dict/BatchDictDeletedEvent.java	0.00% <ø> (ø)
...odel/event/metadata/BatchMetaDataDeletedEvent.java	0.00% <ø> (ø)
...in/model/event/plugin/BatchPluginDeletedEvent.java	0.00% <ø> (ø)
...odel/event/resource/BatchResourceCreatedEvent.java	69.23% <ø> (ø)
...odel/event/resource/BatchResourceDeletedEvent.java	0.00% <ø> (ø)
.../admin/model/event/role/BatchRoleDeletedEvent.java	0.00% <ø> (ø)
.../admin/model/event/rule/BatchRuleDeletedEvent.java	0.00% <ø> (ø)
...henyu/admin/model/event/rule/RuleUpdatedEvent.java	0.00% <ø> (ø)
... and 34 more

... and 14 files with indirect coverage changes

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