fix(radar-transformer): fix theme config priority for radar

[Liu-Hong-Wei]

[中文版模板 / Chinese template]

🤔 This is a ...

• [ ] New feature
• [x] Bug fix
• [ ] TypeScript definition update
• [ ] Bundle size optimization
• [ ] Performance optimization
• [ ] Enhancement feature
• [ ] Refactoring
• [ ] Update dependency
• [ ] Code style optimization
• [ ] Test Case
• [ ] Branch merge
• [ ] Release
• [ ] Site / documentation update
• [ ] Demo update
• [ ] Workflow
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🔗 Related issue link

#3371

🔗 Related PR link

🐞 Bugserver case id

💡 Background and solution

背景: radius 轴 label 等属性默认不显示, 配置个空对象后才能使用 theme 设置的值

解决方案: 如果 theme 中设置了 visible, 优先使用 theme 的值, 否则默认不显示

📝 Changelog

Language	Changelog
🇺🇸 English
🇨🇳 Chinese

☑️ 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

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