Typed layer extension

[mattywausb]

We want to describe a second level of data type that will be applied on a second Table or view with the same column structure.
This will be added as an extention "Cimt late typing layer" = xciltl_

• in field mapping: xciltl_column_final_type (Setting this to "exclude" will exclude the field in the final type table) , xciltl_load_final_type_conversion_function

• at schema: xciltl_final_type_schema_name

• at Table: xciltl_final_type_table_name(this will trigger the creation of a final_type_table), xciltl_final_type_schema_name xciltl_build_final_type_table_as:"view","table","materialized view"

• tests added

• Additional ddl Generator added (Creates views with correct select or the table definition)

• dvpcd extended - Checks, new kind of "refresh" process generation when materialized or table targets

• documentation for "layered / Late typing" concept added