Feat pro textarea saller

[sallerli1]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines
• Tests for the changes have been added/updated or not needed
• Docs and demo have been added/updated or not needed

What is the current behavior?

在比较小的line-height下，textarea元素出现了滚动条

What is the new behavior?

由于内置设置了autoRows： true, 修改overflow为 hidden

Other information

重构部分实现，去掉无用注释

[idux-bot]

This preview will be available after the AzureCI is passed.

[codecov]

Codecov Report

Merging #1080 (47f30df) into main (dcb28b1) will increase coverage by 0.05%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #1080      +/-   ##
==========================================
+ Coverage   96.87%   96.92%   +0.05%     
==========================================
  Files         317      317              
  Lines       30484    30398      -86     
  Branches     2790     2790              
==========================================
- Hits        29530    29463      -67     
+ Misses        954      935      -19     

Impacted Files	Coverage Δ
packages/pro/textarea/src/ProTextarea.tsx	100.00% <ø> (+7.59%)	⬆️
packages/components/textarea/src/Textarea.tsx	100.00% <100.00%> (ø)

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