fix: Button icon order and margin in rtl mode

[afc163]

中文版模板 / Chinese template

🤔 This is a ...

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• Bug fix
• Site / documentation update
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🔗 Related issue link

fix #48807
close #48813
close #48811

💡 Background and solution

RTL 本身会改变文本顺序，不需要增加额外判断。https://github.com/ant-design/ant-design/pull/47791/files#r1593303396

📝 Changelog

Language	Changelog
🇺🇸 English	Fix Button icon wrong order and margin in RTL mode.
🇨🇳 Chinese	修复 Button 在 RTL 下的图标顺序和边距缺失问题。

☑️ 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
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• Changelog is provided or not needed

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[github-actions]

👁 Visual Regression Report for PR #48821 Failed ❌

🎯 Target branch: master (e2d7e68)
📖 View Full Report ↗︎

Expected (Branch master)	Actual (Current PR)	Diff
button-icon-position.compact.png	button-icon-position.compact.png
button-icon-position.compact.png	button-icon-position.compact.css-var.png
button-icon-position.dark.png	button-icon-position.dark.png
button-icon-position.dark.png	button-icon-position.dark.css-var.png
button-icon-position.default.png	button-icon-position.default.png
button-icon-position.default.png	button-icon-position.default.css-var.png

Check Full Report for details

[github-actions]

[github-actions]

size-limit report 📦

Path	Size
./dist/antd.min.js	337.65 KB (-186 B 🔽)
./dist/antd-with-locales.min.js	385.37 KB (-165 B 🔽)

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (e2d7e68) to head (4bef061).

Additional details and impacted files

@@            Coverage Diff            @@
##            master    #48821   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          746       746           
  Lines        12996     12994    -2     
  Branches      3412      3411    -1     
=========================================
- Hits         12996     12994    -2     

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[Wxh16144]

68227f8 这个要不要看一下，感觉可以 revert。 原因我在我的那个 pr 里面描述了一嘴

[afc163]

@Wxh16144 对，感觉也可以回滚。

[afc163]

想合并了 #47318 后用 flex-direction: row-reverse; 来做 iconPosition，代码会简单很多。