Implement untuple field access in ClickHouse

Why it matters

This feature enables simplified and more readable access to individual fields within Tuple columns, addressing the problem of verbose or cumbersome tuple element extraction in queries. It enhances usability and clarity when working with nested tuple data.

How to use it

Users can apply untuple field access by directly referencing tuple elements in queries using the new syntax supported by ClickHouse, simplifying the extraction of tuple fields without complex expressions or functions.