Changes to Get Vendor Catalogs

the query request parameter group_by was restricted to a list of enum values

deleted the query request parameter sort

added the new optional query request parameter fetch_availability_from_provider

added the new optional query request parameter filter.supplier_product

added the new optional query request parameter filter.supplier_product_option

added the new optional query request parameter filter.uom

added the new optional query request parameter sort

added the new enum value PRODUCT to the query request parameter group_by

added the new enum value VENDOR to the query request parameter group_by

added the media type application/json for the response with the status 200