fix: Table expandable with fixed column style

[zombieJ]

🤔 This is a ...

• New feature
• Bug fix
• Site / document update
• Component style update
• TypeScript definition update
• Refactoring
• Code style optimization
• Test Case
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🔗 Related issue link

fix #22127

💡 Background and solution

📝 Changelog

Language	Changelog
🇺🇸 English	Fix Table nest tree column expandable style issue with fixed column.
🇨🇳 Chinese	修复 Table 树形结构下展开与固定列配合的样式问题。

☑️ Self Check before Merge

⚠️ Please check all items below before review. ⚠️

• Doc is updated/provided or not needed
• Demo is updated/provided or not needed
• TypeScript definition is updated/provided or not needed
• Changelog is provided or not needed

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[codecov]

Codecov Report

Merging #22131 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master   #22131   +/-   ##
=======================================
  Coverage   97.96%   97.96%           
=======================================
  Files         306      306           
  Lines        7042     7042           
  Branches     1939     1894   -45     
=======================================
  Hits         6899     6899           
  Misses        143      143

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