fix(rust, python): raise error on ambiguous filter predicates

[ritchie46]

People tend to trip over expression expansion. Make it clear in the error message that the expressions are expanded.

df = pl.DataFrame({"a": [None, "2", "3"], "b": [None, None, "z"]})
df.filter(pl.col(['a','b']).is_null())

ComputeError: The predicate passed to 'filter' expanded to multiple expressions: 

	col("a").is_null(),
	col("b").is_null(),

This is ambiguous. Try to combine the predicates with the 'all' or `any' expression.

> Error originated just after operation: '  DF ["a", "b"]; PROJECT */2 COLUMNS; SELECTION: "None"
'
This operation could not be added to the plan.

closes #6808
closes #7254