Changes to List runtime instances serving an agent

added the new provisioning enum value to the runtimeInstances/items/status response property for the response status 200

added the optional property runtimeInstances/items/controllerId to the response with the 200 status

added the optional property runtimeInstances/items/draining to the response with the 200 status

added the optional property runtimeInstances/items/externalHandle to the response with the 200 status

added the optional property runtimeInstances/items/idleSince to the response with the 200 status

added the optional property runtimeInstances/items/leaseExpiresAt to the response with the 200 status

added the optional property runtimeInstances/items/poolId to the response with the 200 status

added the optional property runtimeInstances/items/provisionAttempts to the response with the 200 status

added the optional property runtimeInstances/items/provisionError to the response with the 200 status

added the optional property runtimeInstances/items/provisionRequestedAt to the response with the 200 status

added the optional property runtimeInstances/items/taskId to the response with the 200 status

endpoint added