Wrong GUID to string conversion with SQLite BinaryGuid=False

[oskarb]

Before NH 5.2, conversion from GUID to string (eg. entity.GuidProperty.ToString()) inside sqlite used a simple cast. This worked if BinaryGuid=False had been specified in the connection string.

Example SQL

    select
        cast(entity0_.Id as char) as col_0_0_ 
    from
        Entity entity0_

Following the fix for #1151 the conversion from GUID to string inside sqlite is now based on a sequence of substr() and hex(). This gives the correct result if BinaryGuid=True (the default), but not if BinaryGuid=False. This is a regression in NH 5.2 (seems undocumented).

[oskarb]

In NH 5.2, when BinaryGuid=False, the resulting string from NHibernate's guid-to-string expressions for SQLite will be of this format:
36333033-6562-3061-2D63-3631652D343436622D616163342D383430366436366363343234

Before 5.2 it came out as a properly formatted GUID.