fix: select check & remove icon align

[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
• Performance optimization
• Enhancement feature
• Internationalization
• Refactoring
• Code style optimization
• Test Case
• Branch merge
• Workflow
• Other (about what?)

🔗 Related issue link

💡 Background and solution

resolve #42489

📝 Changelog

Language	Changelog
🇺🇸 English	Fix Select remove & selected icon not align in center.
🇨🇳 Chinese	修复 Select 移除和选中按钮不居中的问题。

☑️ Self-Check before Merge

⚠️ Please check all items below before requesting a reviewing. ⚠️

• 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

---

🚀 Summary

🤖 Generated by Copilot at f0cb6ec

The pull request enhances the style and code quality of the Select component, especially for the single-select and multiple-select dropdowns. It imports some utilities, removes unused code, and adds flexbox styles to components/select/style/dropdown.tsx and components/select/style/multiple.tsx.

🔍 Walkthrough

🤖 Generated by Copilot at f0cb6ec

• Align selected values and icons in single-select and multiple-select dropdown components by adding flex styles to genSingleStyle and genSizeStyle functions (link, link)
• Import resetComponent and textEllipsis utilities from ../../style in dropdown.tsx to apply common styles to the dropdown components (link)
• Remove unused imports of the same utilities from multiple.tsx to clean up the code (link)

[github-actions]

[github-actions]

size-limit report 📦

Path	Size
./dist/antd.min.js	383.43 KB (+7 B 🔺)
./dist/antd-with-locales.min.js	442.75 KB (+7 B 🔺)

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (e4f84e0) 100.00% compared to head (f0cb6ec) 100.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##            master    #42513    +/-   ##
==========================================
  Coverage   100.00%   100.00%            
==========================================
  Files          640       640            
  Lines        11248     10824   -424     
  Branches      3067      2938   -129     
==========================================
- Hits         11248     10824   -424     

Impacted Files	Coverage Δ
components/select/style/dropdown.tsx	100.00% <ø> (ø)
components/select/style/multiple.tsx	100.00% <ø> (ø)

... and 19 files with indirect coverage changes

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