Adjust more jobs on_workload_node

job_controller/jobs/sample_thumbnail/metadata.json

 {
-    "on_workload_node": false,
-    "_TODO_289735": "Make on_workload_node true when that node is setup",
+    "on_workload_node": true,
     "event_listener": [],
     "data_dir_mount": "/mnt/data"
 }
\ No newline at end of file

job_controller/jobs/source_file_sorter/metadata.json

 {
-    "on_workload_node": false,
-    "_TODO_289735": "Make on_workload_node true when that node is setup",
+    "on_workload_node": true,
     "event_listener": [],
     "interval_execution": {
         "interval": 5,