fix: dropdown should not block ref

[zombieJ]

[中文版模板 / Chinese template]

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🔗 Related issue link

resolve #44965

💡 Background and solution

📝 Changelog

Language	Changelog
🇺🇸 English	Fix Dropdown can not give ref for the root children rendered by dropdownRender.
🇨🇳 Chinese	修复 Dropdown 通过 dropdownRender 渲染的子节点配置 ref 不生效的问题。

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⚠️ Please check all items below before requesting a reviewing. ⚠️

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---

🚀 Summary

🤖 Generated by Copilot at d3c83da

Fixed a focus bug in menu items and added a test case for the dropdownRender prop. Improved the code quality of OverrideContext.tsx by using a custom hook.

🔍 Walkthrough

🤖 Generated by Copilot at d3c83da

• Fix issue [Bug] Form 中自定义Input 输入无效 #32890 where dropdownRender prop blocks the ref of the custom dropdown element by:

• Using useComposeRef hook to merge multiple refs into one in OverrideProvider component (link, link)
• Adding a test case to verify the ref is accessible in dropdownRender prop (link)

• Reorder import statements to group type imports together and separate them from default imports in index.test.tsx (link)

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size-limit report 📦

Path	Size
./dist/antd.min.js	394.34 KB (+16 B 🔺)
./dist/antd-with-locales.min.js	453.55 KB (+20 B 🔺)

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Build	Status	Details	Updated (UTC)
default (Inspect)	✅ No change detected	-	Sep 20, 2023, 8:02 AM

[codecov]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (5c99a5e) 100.00% compared to head (d3c83da) 100.00%.
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##            master    #44971   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          682       682           
  Lines        11547     11548    +1     
  Branches      3105      3105           
=========================================
+ Hits         11547     11548    +1     

Files Changed	Coverage Δ
components/menu/OverrideContext.tsx	100.00% <100.00%> (ø)

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