Add GROUP BY ALL to the SQL engine

[lucazanna]

Description

a few SQL based databases / data warehouses support a GROUP BY ALL statement , which groups by all columns except aggregated columns (sum, etc)

this can speed up EDA work and can be a nice addition for Polars

Examples

BigQuery
https://cloud.google.com/bigquery/docs/reference/standard-sql/query-syntax#group_by_all

DuckDB
https://duckdb.org/docs/sql/query_syntax/groupby.html

Snowflake
https://docs.snowflake.com/en/sql-reference/constructs/group-by

based on discussion here #14704