storage-scrubber: enable jwt auth with storage controller

[skyzh]

This pull request adds 3 fields to the helm chart to support scrubber<->controller auth.

  # -- Enable storage controller related functionalities
  enableStorageControllerConnection: false
  # -- Control plane / storage controller JWT token for connecting to the storage controller
  storageControllerJwtToken: ""
  # -- URL of the storage controller
  storageControllerUrl: ""

Also, users no longer need to supply the executable path in the command field.

Tested by deploying this chart to dev-us-east-2 and it works.