feat(ast): support static property

[taixw2]

Checklist

• npm test passes
• tests are included
• documentation is changed or added
• commit message follows commit guidelines

Description of change

• getExportProps 支持类的静态属性
• close [Feature Request] umi3 扩展路由属性支持类的静态属性 #4638

[codecov]

Codecov Report

Merging #4640 into master will increase coverage by 0.08%.
The diff coverage is 95.00%.

@@            Coverage Diff             @@
##           master    #4640      +/-   ##
==========================================
+ Coverage   82.84%   82.92%   +0.08%     
==========================================
  Files         144      144              
  Lines        2908     2928      +20     
  Branches      717      722       +5     
==========================================
+ Hits         2409     2428      +19     
- Misses        491      492       +1     
  Partials        8        8              

Impacted Files	Coverage Δ
...ackages/ast/src/getExportProps/propertyResolver.ts	99.09% <95.00%> (-0.91%)	⬇️

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