fix: FormLabelAlign item types tuple

[yoyo837]

🤔 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

close #19529

💡 Background and solution

📝 Changelog

Language	Changelog
🇺🇸 English
🇨🇳 Chinese	更新类型定义

☑️ 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

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Deploy preview for ant-design ready!

Built with commit 504e77c

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[codecov]

Codecov Report

Merging #19543 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master   #19543      +/-   ##
==========================================
+ Coverage   97.78%   97.78%   +<.01%     
==========================================
  Files         282      282              
  Lines        7640     7641       +1     
  Branches     2155     2155              
==========================================
+ Hits         7471     7472       +1     
  Misses        169      169

Impacted Files	Coverage Δ
components/form/FormItem.tsx	98.87% <100%> (ø)	⬆️

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[zombieJ]

This update not fix user's typescript error. Conflict caused by propTypes define the labelAlign (as string) which not same with FormItemProps define.
Should remove propTypes instead.