Refactor InListExpr to store arrays and support structs.

Changes:
- Enhance InListExpr to efficiently store homogeneous lists as arrays and avoid a conversion to Vec<PhysicalExpr>
    by adding an internal InListStorage enum with Array and Exprs variants
- Re-use existing hashing and comparison utilities to support Struct arrays and other complex types
- Add public function `in_list_from_array(expr, list_array, negated)` for creating InList from arrays

Author: adriangb