feat: components used in confirm title and content support prefixCls

[Chersquwn]

[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

Background：

Modal.config 中 设置的 rootPrefixCls， 只会作用于Modal.confirm 中的 Modal组件部分，而不会作用于Modal接收的antd子组件，如title和content。因为title和content的类型是ReactNode，可以接收antd组件，在全局设置prefixCls后，会导致这部分组件样式丢失，目前解决方式只能在每个使用的地方都加上prefixCls。

Solution:

Modal.confirm 内部形成一个 context，复用ConfigProvider，将Modal.config 中 设置的 rootPrefixCls传给内部ConfigProvider。

📝 Changelog

Language	Changelog
🇺🇸 English	rootPrefixCls set in Modal.config can be effective for the antd components used in title and content
🇨🇳 Chinese	Modal.config 中设置的 rootPrefixCls 可以对title和content下使用的antd组件生效

☑️ 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]

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[codecov]

Codecov Report

Merging #27376 into feature will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##           feature    #27376   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          389       389           
  Lines         7393      7393           
  Branches      2080      2031   -49     
=========================================
  Hits          7393      7393           

Impacted Files	Coverage Δ
components/modal/ConfirmDialog.tsx	100.00% <100.00%> (ø)

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