[Rust] [DataFusion] Add SQL support for NATURAL JOIN

[asfimport]

(We cannot do this until we have basic SQL JOIN working)

A NATURAL JOIN is a JOIN operation that creates an implicit join clause for you based on the common columns in the two tables being joined. Common columns are columns that have the same name in both tables. A NATURAL JOIN can be an INNER join, a LEFT OUTER join, or a RIGHT OUTER join. The default is INNER join.

Reporter: Andy Grove / @andygrove

Related issues:

• [Rust] [DataFusion] Add SQL support for JOIN with USING clause (is cloned by)

_{Note: This issue was originally created as ARROW-10727. Please see the migration documentation for further details.}

[asfimport]

Andrew Lamb / @alamb:
Migrated to github: apache/datafusion#117