OCTRL-759 [core] clearer deployment failure logs for OPS

- shortened one phrase and demoted the log to support, as a similar log is always produced for OPS anyway
- removed redundant prefix "deployment error", which IMHO does not add anything to error message which follows (e.g "deployment error error=workflow deployment failed..." becomes "workflow deployment failed...")

core/environment/transition_deploy.go

@@ -342,9 +342,9 @@ func (t DeployTransition) do(env *Environment) (err error) {
 	}
 
 	if err != nil {
-		log.WithError(err).
+		log.WithField("level", infologger.IL_Ops).
 			WithField("partition", env.Id().String()).
-			Error("deployment error")
+			Error(err)
 		return
 	}
 

core/task/manager.go

@@ -1207,7 +1207,8 @@ func (m *Manager) handleMessage(tm *TaskmanMessage) error {
 			if err != nil {
 				log.WithError(err).
 					WithField("partition", tm.GetEnvironmentId().String()).
-					Errorf("Failed task creation and Mesos resources allocation during the deployment of the environment. For more details check Devel logs in Info Logger.")
+					WithField("level", infologger.IL_Support).
+					Errorf("failed task creation and Mesos resources allocation during the deployment of the environment. More details in Devel logs.")
 			}
 		}()
 	case taskop.ConfigureTasks: