fix: (FormItem) help icon click stopPropagation

[damonyoungcc]

close #6548

[github-actions]

PR preview has been successfully built and deployed to https://antd-mobile-preview-pr-6549.surge.sh

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.34%. Comparing base (76e3583) to head (8932a89).
Report is 3 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6549      +/-   ##
==========================================
+ Coverage   92.27%   92.34%   +0.06%     
==========================================
  Files         317      318       +1     
  Lines        6904     6910       +6     
  Branches     1729     1729              
==========================================
+ Hits         6371     6381      +10     
+ Misses        497      493       -4     
  Partials       36       36              

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