fix: Input with readOnly should not clearable

[zombieJ]

🤔 This is a ...

• New feature
• Bug fix
• Site / document update
• Component style update
• TypeScript definition update
• Refactoring
• Code style optimization
• Test Case
• Branch merge
• Other (about what?)

🔗 Related issue link

fix #21488

💡 Background and solution

📝 Changelog

Language	Changelog
🇺🇸 English	Fix Input with readOnly still clearable by allowClear.
🇨🇳 Chinese	修复 Input 在设置 readOnly 时 allowClear 仍然可以清除的问题。

☑️ Self Check before Merge

• 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

[tests-checker]

Could you please add tests to make sure this change works as expected?

[ant-design-bot]

[codesandbox-ci]

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[codecov]

Codecov Report

Merging #21494 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master   #21494      +/-   ##
==========================================
+ Coverage   97.83%   97.83%   +<.01%     
==========================================
  Files         302      302              
  Lines        7018     7024       +6     
  Branches     1923     1894      -29     
==========================================
+ Hits         6866     6872       +6     
  Misses        152      152

Impacted Files	Coverage Δ
components/input/ClearableLabeledInput.tsx	100% <100%> (ø)	⬆️

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