add feign client annotation support

[suncairong163]

What is the purpose of the change

feign client annotation support
#87

Brief changelog

Verifying this change

@chickenlj

Checklist

• Make sure there is a GitHub_issue field for the change (usually before you start working on it). Trivial changes like typos do not require a GitHub issue. Your pull request should address just this issue, without pulling in other changes - one PR resolves one issue.
• Each commit in the pull request should have a meaningful subject line and body.
• Write a pull request description that is detailed enough to understand what the pull request does, how, and why.
• Check if is necessary to patch to Dubbo 3 if you are work on Dubbo 2.7
• Write necessary unit-test to verify your logic correction, more mock a little better when cross module dependency exist. If the new feature or significant change is committed, please remember to add sample in dubbo samples project.
• Add some description to dubbo-website project if you are requesting to add a feature.
• GitHub Actions works fine on your own branch.
• If this contribution is large, please follow the Software Donation Guide.

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
2 Code Smells

95.0% Coverage
0.0% Duplication

[codecov-commenter]

Codecov Report

Merging #12736 (620067c) into 3.3 (c7d411c) will decrease coverage by 0.18%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##                3.3   #12736      +/-   ##
============================================
- Coverage     68.25%   68.08%   -0.18%     
  Complexity        6        6              
============================================
  Files          1683     1685       +2     
  Lines         69022    69327     +305     
  Branches      10049    10091      +42     
============================================
+ Hits          47113    47200      +87     
- Misses        17295    17515     +220     
+ Partials       4614     4612       -2     

see 48 files with indirect coverage changes

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[chickenlj]

LGTM.