Adding pushdown projection or filtering for ToProto Scan

[asfimport]

We aren't handling any kind of pushdown projection or filtering in https://issues.apache.org/jira/browse/ARROW-16855.

It would be better to finalize this once 

Both of those would probably be a bit easier to do if I ever got around to finishing https://issues.apache.org/jira/browse/ARROW-16072. 

Reporter: Vibhatha Lakmal Abeykoon / @vibhatha

_{Note: This issue was originally created as ARROW-16909. Please see the migration documentation for further details.}

[github-actions]

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