fix(form): 修复transform方法与文档用法预期不符

[xliez]

fix: #7483

有点担心是否会造成已经在将错就错得使用的代码引发问题😥

[github-actions]

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[chenshuai2144]

感觉会这样的，测试怎么挂了

[xliez]

coverage CI 我本地执行测试是通过的
Build CI tsc 不通过似乎是因为 Select 的 allowClear props 和 Input 的不一致导致的

[xliez]

重新执行了下测试用例，failed 的 case 还不一样了😥

[chenshuai2144]

mege 一下 master

[codecov]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (481d7a2) 98.31% compared to head (c4fc393) 98.32%.

❗ Current head c4fc393 differs from pull request most recent head c6d86f7. Consider uploading reports for the commit c6d86f7 to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #7486   +/-   ##
=======================================
  Coverage   98.31%   98.32%           
=======================================
  Files         340      340           
  Lines       11366    11374    +8     
  Branches     4265     4268    +3     
=======================================
+ Hits        11175    11183    +8     
  Misses        150      150           
  Partials       41       41           

Files Changed	Coverage Δ
...ackages/utils/src/transformKeySubmitValue/index.ts	100.00% <100.00%> (ø)

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