fix(table): async loading size

[uyarn]

🤔 这个 PR 的性质是？

• 日常 bug 修复
• 新特性提交
• 文档改进
• 演示代码改进
• 组件样式/交互改进
• CI/CD 改进
• 重构
• 代码风格优化
• 测试用例
• 分支合并
• 其他

🔗 相关 Issue

💡 需求背景和解决方案

在 Tencent/tdesign-common#507 中移除了对Table组件中Loading组件的大小设置 忽略了加载更多这里的样式问题 同样需要增加size small处理

📝 更新日志

• fix(table): 修复加载更多的加载组件尺寸异常问题

• 本条 PR 不需要纳入 Changelog

☑️ 请求合并前的自查清单

⚠️ 请自检并全部勾选全部选项。⚠️

• 文档已补充或无须补充
• 代码演示已提供或无须提供
• TypeScript 定义已补充或无须补充
• Changelog 已提供或无须提供

[codecov-commenter]

Codecov Report

Merging #907 (a9b4af7) into develop (8fdcb64) will decrease coverage by 0.52%.
The diff coverage is 48.42%.

@@             Coverage Diff             @@
##           develop     #907      +/-   ##
===========================================
- Coverage    60.81%   60.28%   -0.53%     
===========================================
  Files          914      930      +16     
  Lines        15385    16419    +1034     
  Branches      3467     3716     +249     
===========================================
+ Hits          9357     9899     +542     
- Misses        6028     6520     +492     

Impacted Files	Coverage Δ
src/addon/Addon.tsx	0.00% <0.00%> (-92.31%)	⬇️
src/button/defaultProps.ts	100.00% <ø> (ø)
src/cascader/defaultProps.ts	100.00% <ø> (ø)
src/checkbox/defaultProps.ts	100.00% <ø> (ø)
src/color-picker/defaultProps.ts	100.00% <ø> (ø)
src/comment/Comment.tsx	95.45% <ø> (ø)
src/date-picker/DateRangePicker.tsx	10.41% <0.00%> (-0.46%)	⬇️
src/date-picker/base/Cell.tsx	20.00% <0.00%> (+13.33%)	⬆️
src/date-picker/base/Footer.tsx	73.33% <0.00%> (+59.04%)	⬆️
src/date-picker/base/Header.tsx	42.42% <ø> (+37.87%)	⬆️
... and 161 more

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