[type Refactor]extractor add BaseAnnotationApiBeansExtractor

[li-keguo]

about issue #4560

work list:

• add BaseAnnotationApiBeansExtractor.
• Refactor SpringCloudApiBeansExtractor.
• Refactor SpringMvcApiBeansExtractor.

[codecov-commenter]

Codecov Report

Merging #4787 (3167ab4) into master (eca1211) will decrease coverage by 0.12%.
The diff coverage is 48.07%.

@@             Coverage Diff              @@
##             master    #4787      +/-   ##
============================================
- Coverage     65.62%   65.51%   -0.12%     
- Complexity     8144     8147       +3     
============================================
  Files          1133     1135       +2     
  Lines         33162    33236      +74     
  Branches       2969     2967       -2     
============================================
+ Hits          21764    21773       +9     
- Misses         9667     9734      +67     
+ Partials       1731     1729       -2     

Impacted Files	Coverage Δ
...ter/extractor/BaseAnnotationApiBeansExtractor.java	0.00% <0.00%> (ø)
...core/register/extractor/BaseApiBeansExtractor.java	0.00% <0.00%> (ø)
...nyuSpringCloudClientInfoRegisterConfiguration.java	0.00% <0.00%> (ø)
...henyuSpringMvcClientInfoRegisterConfiguration.java	0.00% <0.00%> (ø)
...rg/apache/shenyu/client/core/register/ApiBean.java	53.84% <49.12%> (-17.27%)	⬇️
...ngcloud/register/SpringCloudApiBeansExtractor.java	73.07% <75.00%> (-9.07%)	⬇️
...springmvc/register/SpringMvcApiBeansExtractor.java	87.50% <94.44%> (+5.35%)	⬆️
...re/register/registrar/AbstractApiDocRegistrar.java	94.02% <100.00%> (+0.09%)	⬆️
...ringcloud/register/SpringCloudApiMetaRegister.java	93.54% <100.00%> (+0.10%)	⬆️
...t/springmvc/register/SpringMvcApiMetaRegister.java	90.90% <100.00%> (+0.13%)	⬆️

... and 1 file with indirect coverage changes

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[tian-pengfei]

Wonderful improvement!