fix: Select item z-index

[zombieJ]

[中文版模板 / Chinese template]

🤔 This is a ...

• New feature
• Bug fix
• Site / documentation update
• Demo update
• Component style update
• TypeScript definition update
• Bundle size optimization
• Perfermance optimization
• Refactoring
• Code style optimization
• Test Case
• Branch merge
• Other (about what?)

🔗 Related issue link

fix #24157

💡 Background and solution

📝 Changelog

Language	Changelog
🇺🇸 English	Remove Select Option pointer-events style in selector to enable user interactive.
🇨🇳 Chinese	移除 Select Option 在选择框中 pointer-events 样式以允许用户交互行为。

☑️ 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

[ant-design-bot]

[codecov]

Codecov Report

Merging #24170 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master   #24170   +/-   ##
=======================================
  Coverage   98.82%   98.82%           
=======================================
  Files         364      364           
  Lines        7301     7301           
  Branches     2034     1984   -50     
=======================================
  Hits         7215     7215           
  Misses         86       86           

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