fix: Input[allowClear] className

[afc163]

[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
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🔗 Related issue link

close #27444
close #27258

💡 Background and solution

📝 Changelog

Language	Changelog
🇺🇸 English	Fix Input missing className when allowClear is true.
🇨🇳 Chinese	修复 Input allowClear 时 className 丢失的问题。

☑️ 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]

[codesandbox-ci]

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Latest deployment of this branch, based on commit 103b12a:

Sandbox	Source
antd reproduction template	Configuration
antd-issue-repro-custom-classes-clearable-input	Issue #27444

[codecov]

Codecov Report

Merging #27462 into master will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##            master    #27462   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          389       389           
  Lines         7383      7385    +2     
  Branches      2075      2069    -6     
=========================================
+ Hits          7383      7385    +2     

Impacted Files	Coverage Δ
components/input/ClearableLabeledInput.tsx	100.00% <100.00%> (ø)

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[github-actions]

Size Change: +37 B (0%)

Total Size: 791 kB

Filename	Size	Change
./dist/antd-with-locales.min.js	314 kB	+16 B (0%)
./dist/antd.min.js	277 kB	+21 B (0%)

ℹ️ View Unchanged

Filename	Size	Change
./dist/antd.compact.min.css	66.5 kB	0 B
./dist/antd.dark.min.css	67.8 kB	0 B
./dist/antd.min.css	66.5 kB	0 B

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