Adjust jobs on_workload_node

job_controller/jobs/ffmpeg_filter_graph_target/metadata.json

 {
-    "on_workload_node": false,
-    "_TODO_289735": "Make on_workload_node true when that node is setup",
+    "on_workload_node": true,
     "_NOTE ffmpeg randomly fails with too little memory. It has failed sometimes with 4GB, so we have 8GB": "",
     "cpu_limit": "2",
     "memory_limit": "8Gi",

job_controller/jobs/media_process_scheduler/metadata.json

 {
-    "on_workload_node": false,
-    "_TODO_289735": "Make on_workload_node true when that node is setup",
+    "on_workload_node": true,
     "data_dir_mount": "/mnt/data",
     "event_listener": [
         {

job_controller/jobs/rescale_video/metadata.json

 {
-    "on_workload_node": false,
-    "_TODO_289735": "Make on_workload_node true when that node is setup",
+    "on_workload_node": true,
     "_NOTE ffmpeg randomly fails with too little memory. It has failed sometimes with 4GB, so we have 8GB": "",
     "cpu_limit": "1",
     "memory_limit": "8Gi",