Changes to GET /api/job_monitor/gpu

added the optional property results to the response with the 200 status

added the new optional query request parameter usernames

the query request parameter username became optional

removed the required property data from the response with the 200 status

added the optional property gpu_active_percentage to the response with the 200 status

added the optional property gpu_active_total to the response with the 200 status

added the optional property gpu_count_total to the response with the 200 status

added the optional property has_data to the response with the 200 status

added the optional property username to the response with the 200 status

the data response's property type changed from no type to array for status 200