[Draft] Support fabric dw

[kosinsky]

Draft PR to my repo to add support for Fabric DW.
So far:

• Created createNorthwindFabricDw.sql compatible with Fabric DW
• Added DataTestUtility.IsFabricDW and DataTestUtility.IsNotFabricDW to mark tests which aren't compatible
• A few adjustments to avoid using types which aren't supported in Fabric. Doc - https://learn.microsoft.com/en-us/fabric/data-warehouse/data-types#data-types-in-warehouse
• In tests which depend on order of rows returned from SQL added explicit order by. For example, select * from orders where orderid < 10253 order by orderid asc". For box SQL and SQL DB select * from orders where orderid < 10253 works correctly, because orders tables has clustered index on orderid and query optimizer will use it and return data preordered. That's lucky coincident and it isn't true for Fabric due to lack of B-tree indexes
• Current state of tests: