fix(comp:button): the radius of button group always hidden

[danranVm]

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 ButtonGroup 中的 border radius 被全部干掉了

What is the new behavior?

• border radius 正常显示
• class 名修改：ix-button-group-with-gap => ix-button-group-compact

Other information

[idux-bot]

This preview will be available after the AzureCI is passed.

[codecov]

Codecov Report

Merging #1290 (d7dcd5e) into main (5a9eb9d) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main    #1290   +/-   ##
=======================================
  Coverage   93.04%   93.04%           
=======================================
  Files         321      321           
  Lines       29737    29737           
  Branches     3353     3353           
=======================================
  Hits        27668    27668           
  Misses       2069     2069           

Impacted Files	Coverage Δ
packages/components/button/src/ButtonGroup.tsx	100.00% <100.00%> (ø)
packages/components/button/src/types.ts	100.00% <100.00%> (ø)

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