chore: Adjust search style

[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

💡 Background and solution

📝 Changelog

Language	Changelog
🇺🇸 English	Adjust Input.Search icon style.
🇨🇳 Chinese	调整 Input.Search 的搜索图标样式。

☑️ 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

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View rendered components/config-provider/demo/size.md

[ant-design-bot]

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[codecov]

Codecov Report

Merging #23406 into feature will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           feature   #23406   +/-   ##
========================================
  Coverage    98.38%   98.38%           
========================================
  Files          364      364           
  Lines         7325     7325           
  Branches      2008     2008           
========================================
  Hits          7207     7207           
  Misses         118      118           

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[afc163]

后面整个区域应该是可 hover 可点击的。