Changes to Bulk create statuses

removed the optional property items/usages from the response with the 200 status

removed the optional property items/workflowUsages from the response with the 200 status

the response property items/usages became nullable for the status 200

the response property items/usages/items became nullable for the status 200

the response property items/workflowUsages became nullable for the status 200

the response property items/workflowUsages/items became nullable for the status 200