Add subquery support in `datafusion-proto`

[andygrove]

Is your feature request related to a problem or challenge? Please describe what you are trying to do. Once https://github.com/apache/arrow-datafusion/pull/2639 is merged we should add support for serializing plans that contain subquery expressions.

This will likely require breaking changes to the API because we currently have one API for Expr that optionally accepts a FunctionRegistry and one API for LogicalPlan that optionally accepts a LogicalExtensionCodec. With subquery support we have plans referencing expressions and expressions referencing plans, so these APIs will need to be combined somehow.

Here is a suggestion for the new API from the discussion at https://github.com/apache/arrow-datafusion/pull/2639#discussion_r884249631

let bytes = PlanSerializer::new()
    .with_extension_codec(&extension_codec)
   .serialize()?;

Describe the solution you'd like TBD

Describe alternatives you've considered None

Additional context None

[liukun4515]

feature of the subquery is needed in my system, I can figure out this issue. @andygrove

[liukun4515]

also with that: https://github.com/apache/arrow-datafusion/issues/2338 and https://github.com/andygrove/arrow-datafusion/blob/39c444835ddcb38cf1efeb4414fbb8ecd49ac020/datafusion/proto/src/to_proto.rs#L710

[alamb]

When we implement this feature, it might be worth considering a slightly more encapsulated API for serializing / deserializing plans, as described in https://github.com/apache/arrow-datafusion/pull/2639#discussion_r884249631

[andygrove]

I have a PR up (https://github.com/apache/arrow-datafusion/pull/2670) with a proposal for the API part

[alamb]

Possibly duplicated by https://github.com/apache/arrow-datafusion/issues/2646