Fix Sorting in Snowflake

[AdRiley]

Pull Request Description

Fixes #10835

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[radeusgd]

Can we add a test for case insensitive ordering ? As mentioned in the ticket we currently seem to be lacking one.

It'd be good to have one so that we avoid regressions, and ensure that we correctly handle this edge case when adding future dialects.

I was originally planning to add a test case as part of this ticket, if we want to add such test in separate PR I'm not against that, but let's then create a ticket to keep track of it - otherwise I'd be worried we may forget to do it.

[AdRiley]

I think there is a case insensitive test

    group_builder.specify "should support natural and case insensitive ordering at the same time" <|
        t1 = data.table.sort [..Name "psi"] text_ordering=(..Case_Insensitive sort_digits_as_numbers=True)
        case setup.flagged ..Supports_Sort_Digits_As_Numbers of
            True -> t1.at "psi" . to_vector . should_equal [Nothing, "c01", "C2", "c10"]
            False -> t1.should_fail_with (Unsupported_Database_Operation.Error "sort_digits_as_numbers")

        t2 = data.table.sort [..Name "psi"] text_ordering=(..Default sort_digits_as_numbers=True)
        case setup.flagged ..Supports_Sort_Digits_As_Numbers of
            True -> t2.at "psi" . to_vector . should_equal [Nothing, "C2", "c01", "c10"]
            False -> t2.should_fail_with (Unsupported_Database_Operation.Error "sort_digits_as_numbers")

        t3 = data.table.sort [..Name "psi"] text_ordering=(..Case_Insensitive)
        t3.at "psi" . to_vector . should_equal [Nothing, "c01", "c10", "C2"]

        t4 = data.table.sort [..Name "psi"]
        case setup.flagged ..Case_Insensitive_Ordering of
            True -> t4.at "psi" . to_vector . should_equal [Nothing, "c01", "c10", "C2"]
            False -> t4.at "psi" . to_vector . should_equal [Nothing, "C2", "c01", "c10"]