Build join schema in a single place

[comphead]

Is your feature request related to a problem or challenge?

There are two fn build_join_schema implementations https://github.com/apache/arrow-datafusion/blob/3ad7734a7e5b1844b02f1374d0dc1c441bef216d/datafusion/expr/src/logical_plan/builder.rs#L1039 https://github.com/apache/arrow-datafusion/blob/6e819d6c2b9280198c67fa16df3e54c79ce46ca2/datafusion/core/src/physical_plan/joins/utils.rs#L349

which likely doing the same thing. Ideally to have single code base for all usecases

Describe the solution you'd like

have single code base for all build join schema usecases

Describe alternatives you've considered

None

Additional context

Followup from https://github.com/apache/arrow-datafusion/pull/6015#discussion_r1168475782

[comphead]

Working on this issue

[mingmwang]

Looks like one is for logic plan and one is for physical plan ?

[comphead]

Looks like one is for logic plan and one is for physical plan ?

Thats correct, but will try to figure out if we can factor out the common part