Changes to List hourly sandbox usage costs

added the optional property items/items/compute_standard_units to the response with the 200 status

added the optional property items/items/storage_standard_units to the response with the 200 status

added the optional property totals/allOf[#/components/schemas/sandboxes.SandboxUsageCostTotals]/compute_standard_units to the response with the 200 status

added the optional property totals/allOf[#/components/schemas/sandboxes.SandboxUsageCostTotals]/storage_standard_units to the response with the 200 status

endpoint added