Remove direct dependency of alibaba dubbo

[AlbumenJ]

What is the purpose of the change

Newly added options

• dubbo.compact.enable to indicate that whether load Alibaba Dubbo related classes or not

Brief changes

• Add org.apache.dubbo.common.compact.Dubbo2CompactUtils to support disable load alibaba dubbo dependencies
• Move all direct dependencies into dubbo-compactable module
• Check if load com.alibaba extensions in ExtensionLoader

Brief changelog

Verifying this change

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
66 Code Smells

15.9% Coverage
2.3% Duplication

[codecov-commenter]

Codecov Report

Merging #13218 (a6ec6ca) into 3.2 (a4a3fd7) will decrease coverage by 0.04%.
Report is 12 commits behind head on 3.2.
The diff coverage is n/a.

@@             Coverage Diff              @@
##                3.2   #13218      +/-   ##
============================================
- Coverage     69.44%   69.41%   -0.04%     
  Complexity        2        2              
============================================
  Files          1649     1651       +2     
  Lines         68725    68913     +188     
  Branches      10014    10043      +29     
============================================
+ Hits          47728    47834     +106     
- Misses        16405    16458      +53     
- Partials       4592     4621      +29     

see 47 files with indirect coverage changes

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[CrazyHZM]

LGTM.
But one question is, if there are no users who dependence on dubbo-compatible, will there be some related classes that can't be found? Such as com.alibaba.dubbo.config.annotation.Reference. @AlbumenJ

[AlbumenJ]

LGTM. But one question is, if there are no users who dependence on dubbo-compatible, will there be some related classes that can't be found? Such as com.alibaba.dubbo.config.annotation.Reference. @AlbumenJ

Currently, dubbo-all depends on dubbo-compatible. In the future, maybe 3.3 or 3.4, we can remove it and provide a pure jar.