UnionAll support for Ballista

[yjshen]

Is your feature request related to a problem or challenge? Please describe what you are trying to do.
Currently, UnionAll is only available in DataFusion core, it would be nice to also add this to Ballista.

[liukun4515]

There are some gaps between datafusion and ballista like #1985 and #1984

[yjshen]

@liukun4515 Do we have an umbrella ticket to track all these gaps?

[Ted-Jiang]

@yjshen @liukun4515
i will take this😊