[Feature] react-vtable 的popover组件，支持背景色，padding属性

[liuboying1119]

What problem does this feature solve?

1 希望支持popver的背景色，来支持不同主题下的适配
2 希望支持popver的内边距，来调整文字距离边框的大小

What does the proposed API look like?

<Popover
key={index}
content={

{record.metricName[index]}

{record.metricDesc[index]}

}
position={'bottom'}
padding={8}
backgroundColor={'#77777'}
>
<Tag
attribute={{
text: d,
textStyle: {
fontSize: 14,
fontFamily: 'sans-serif',
texturePadding: 16,
fill: themeStore === 'dark' ? '#fff' : '#2e2f32',
},
panel: {
visible: true,
fill: 'rgba(92, 184, 85, 0.10)',
lineWidth: 1,
cornerRadius: [16],
},
boundsPadding: [0, 0, 0, 8],
}}
>