feat: descriptions add less variable

[hengkx]

…ons-it,@descriptions-item-label-colon-margin-leftem-label-colon-margin-right,

🤔 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 #23998

💡 Background and solution

📝 Changelog

Language	Changelog
🇺🇸 English	Descriptions add less variables @descriptions-item-trailing-colon and etc.
🇨🇳 Chinese	Descriptions 新增 @descriptions-item-trailing-colon 等 less 变量。

☑️ 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]

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[codecov]

Codecov Report

Merging #24032 into feature will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           feature   #24032   +/-   ##
========================================
  Coverage    98.74%   98.74%           
========================================
  Files          364      364           
  Lines         7302     7302           
  Branches      2033     2033           
========================================
  Hits          7210     7210           
  Misses          92       92           

Impacted Files	Coverage Δ
components/descriptions/Cell.tsx	100.00% <ø> (ø)

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