[VL] Add support for theta sketch based aggregate/scalar functions

### Description

Spark introduced these functions in 4.1. This support may not be urgent, depending on how many users actually rely on them.

Spark PR: https://github.com/apache/spark/pull/51298

Start with the linked Apache Spark PR #51298 to identify the theta sketch aggregate and scalar functions being added. Trace how corresponding functionality is exposed in Gluten and its native execution layer, then verify that the listed functions are supported and covered by the relevant tests.

Written by the indexing model from the issue text.