feat: Adds ja_JP localisations for Form

[kentaro84207]

[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
• Perfermance optimization
• Refactoring
• Code style optimization
• Test Case
• Branch merge
• Other (about what?)

🔗 Related issue link

#23369

💡 Background and solution

Added a ja_JP localisations because it wasn't set up yet.

📝 Changelog

Language	Changelog
🇺🇸 English	Add ja_JP localisations for Form
🇨🇳 Chinese

☑️ 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]

[ant-design-bot]

[codesandbox-ci]

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[codecov]

Codecov Report

Merging #25244 into master will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master   #25244   +/-   ##
=======================================
  Coverage   99.43%   99.43%           
=======================================
  Files         365      365           
  Lines        7303     7304    +1     
  Branches     1993     2043   +50     
=======================================
+ Hits         7262     7263    +1     
  Misses         41       41           

Impacted Files	Coverage Δ
components/locale/ja_JP.tsx	100.00% <100.00%> (ø)

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