[type refactor]Adjust processor functions

[li-keguo]

work list

• Clearly register the processor and extract processor responsibilities
• The decimation processor supports multiple clients

[codecov-commenter]

Codecov Report

Merging #4948 (7f2361e) into master (3082629) will increase coverage by 0.03%.
Report is 1 commits behind head on master.
The diff coverage is 13.79%.

@@             Coverage Diff              @@
##             master    #4948      +/-   ##
============================================
+ Coverage     63.91%   63.94%   +0.03%     
- Complexity     8524     8529       +5     
============================================
  Files          1207     1208       +1     
  Lines         35895    35900       +5     
  Branches       3219     3220       +1     
============================================
+ Hits          22943    22957      +14     
+ Misses        11098    11088      -10     
- Partials       1854     1855       +1     

Files Changed	Coverage Δ
...ter/extractor/BaseAnnotationApiBeansExtractor.java	0.00% <ø> (ø)
...core/register/extractor/BaseApiBeansExtractor.java	0.00% <0.00%> (ø)
.../core/register/matcher/ApiAnnotationProcessor.java	0.00% <ø> (ø)
...nt/core/register/matcher/ApiRegisterProcessor.java	0.00% <ø> (ø)
...e/register/matcher/BaseAnnotationApiProcessor.java	0.00% <0.00%> (ø)
...ient/core/register/matcher/ExtractorProcessor.java	0.00% <0.00%> (ø)
.../core/register/registrar/BaseApiRegistrarImpl.java	0.00% <0.00%> (ø)
...ent/apache/dubbo/ApacheDubboApiBeansExtractor.java	0.00% <ø> (ø)
...bbo/processor/extractor/DubboServiceProcessor.java	0.00% <0.00%> (ø)
...he/dubbo/processor/extractor/ServiceProcessor.java	0.00% <0.00%> (ø)
... and 3 more

... and 2 files with indirect coverage changes

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