Cannot pushdown filters on types not native to Substrait

[westonpace]

The arrow type system is wider than Substrait's default types (e.g. unsigned integers, large strings, etc.). There is a spec for expressing these types as Substrait user defined types (https://github.com/apache/arrow/blob/main/format/substrait/extension_types.yaml) however, Datafusion doesn't yet support the extension.

As a result, filters containing these types will be rejected when used as pushdown (e.g. through DuckDb) or provided directly from Substrait.

This is primarily a tracking issue. Once Datafusion supports these types we shouldn't need to do any additional work but it would be good to add some regression tests.