feat: DatePicker support kk:mm format

[cooljser]

[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
• Performance optimization
• Enhancement feature
• Internationalization
• Refactoring
• Code style optimization
• Test Case
• Branch merge
• Workflow
• Other (about what?)

🔗 Related issue link

close #38141
close #38482

💡 Background and solution

📝 Changelog

Language	Changelog
🇺🇸 English	timecpiker support kk:mm format。
🇨🇳 Chinese	DatePicker 支持 kk:mm 格式的 format 以支持显示 24:00。

☑️ Self-Check before Merge

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

• 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

---

🚀 Summary

🤖 Generated by Copilot at dbd4b75

This pull request adds support for the kk:mm format in the DatePicker component, which displays a time panel with two columns for hours and minutes. It also fixes a bug where the hour column was shown even when the format string did not include any hour symbols.

🔍 Walkthrough

🤖 Generated by Copilot at dbd4b75

• Hide hour column in time panel if format string does not include 24-hour notation (link)
• Add test case for DatePicker component with kk:mm format (link)

[github-actions]

[codecov]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (ffedddb) 100.00% compared to head (95407d6) 100.00%.

Additional details and impacted files

@@            Coverage Diff            @@
##           feature    #42494   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          640       640           
  Lines        10870     10875    +5     
  Branches      2952      2957    +5     
=========================================
+ Hits         10870     10875    +5     

Impacted Files	Coverage Δ
components/date-picker/generatePicker/index.tsx	100.00% <100.00%> (ø)

☔ View full report in Codecov by Sentry.
📢 Do you have feedback about the report comment? Let us know in this issue.