Derive Clone for more ExecutionPlans

[alamb]

Which issue does this PR close?

Closes # #13202

Rationale for this change

See #13202

What changes are included in this PR?

1. Add Clone for other ExecutionPlans

Note there are some ExecutionPlans that are not clonable (like HashJoinExec) because they have some shared state (a once_fut used to coordinate amongst threads). It was hard to see how to add Clone to those so I left it alone but left a comment for future readers

Are these changes tested?

By existing CI tests

Are there any user-facing changes?

[findepi]

IMO we should make fields public instead.
See #13202 (comment)

[comphead]

Would be amazing to clarify what is OnceAsync and why clone is not fit for it?

[alamb]

will try

[alamb]

Here is my attempt: #13223

[comphead]

Thanks, in that case we can highlight it in doc? OnceAsync

[alamb]

Good idea -- I tried to clarify in b5ffef0

[alamb]

IMO we should make fields public instead. See #13202 (comment)

I am not sure making the fields pub really solves my usecase -- namely that I have a &SortExec (ref to a SortExec that is really in an Arc<..>) and I want to make a modified copy of it.

Even if the fields are pub I still couldn't change them.

I don't have a strong preference one way or the other over pub fields (or mut accessors like set_preserve_partitions())

[comphead]

thanks @alamb 💪

[alamb]

🚀