feat: v5 dropdown style

[MadCcc]

[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
• Other (about what?)

🔗 Related issue link

💡 Background and solution

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📝 Changelog

Language	Changelog
🇺🇸 English	-
🇨🇳 Chinese	-

☑️ 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

[github-actions]

[github-actions]

Size Change: +216 B (0%)

Total Size: 879 kB

Filename	Size	Change
./dist/antd-with-locales.min.js	468 kB	+96 B (0%)
./dist/antd.min.js	411 kB	+120 B (0%)

_{compressed-size-action}

[codecov]

Codecov Report

Merging #37491 (ac648d2) into next (8e328d0) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##              next    #37491   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          524       524           
  Lines         8955      8955           
  Branches      2443      2443           
=========================================
  Hits          8955      8955           

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

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