fix: add Drawer Spin className

[li-jia-nan]

中文版模板 / Chinese template

🤔 This is a ...

• New feature
• Bug fix
• Site / documentation update
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• TypeScript definition update
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🔗 Related issue link

💡 Background and solution

📝 Changelog

Language	Changelog
🇺🇸 English	fix: add Spin className
🇨🇳 Chinese	给 Drawer 的内部组件 Spin 添加 className，防止内部 Spin 样式覆盖用户传入的 Spin 样式

☑️ 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
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[github-actions]

[github-actions]

👁 Visual Regression Report for PR #48857 Passed ✅

🎯 Target branch: master (6da1ad1)
📖 View Full Report ↗︎

🎊 Congrats! No visual-regression diff found.

[github-actions]

size-limit report 📦

Path	Size
./dist/antd.min.js	337.73 KB (+2 B 🔺)
./dist/antd-with-locales.min.js	385.46 KB (-85 B 🔽)

[afc163]

Drawer 的 Spin 改成包裹是不是会更好一点？#48858

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[li-jia-nan]

Drawer 的 Spin 改成包裹是不是会更好一点？#48858

等 Preview 跑过了看看效果

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (c3cf0de) to head (e17279f).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##            master    #48857   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          746       746           
  Lines        12994     12994           
  Branches      3411      3411           
=========================================
  Hits         12994     12994           

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