[Feature] Can we freely decide between thousandSeparator and decimalSeparator?

### What problem does this feature solve?

I am a developer serving the Brazilian market, where thousandSeparator is '.' , decimalSeparator is ',', now it is possible to use formatter to reach the target, but it is not possible to configure it globally, which is a pain

https://github.com/apache/echarts/blob/master/src/util/format.ts#L32

### What does the proposed API look like?

const opts = {
formatterConfig: {
thousandSeparator: ',',
decimalSeparator: '.',
},
}