Improve Ewoksweb usage

Ewoksweb does not have a sensible way of naming/grouping BES tasks (they are all called "run")

BES tasks are also recognized as "method" instead of "ppfmethod"

{
  "task_type": "method",
  "task_identifier": "bes.actors.burnStrategyNoReferenceImages.run",
  "required_input_names": [
    "beamline",
    "workflowParameters",
    "directory",
    "characterisationOscillationRange",
    "characterisationExposureTime",
    "characterisationTransmission"
  ],
  "optional_input_names": [
    "resolution",
    "automatic_mode",
    "collection_software",
    "token"
  ],
  "output_names": [
    "return_value"
  ],
  "category": "bes",
  "description": null,
  "icon": "default.png",
  "label": "run"
}

To discover all tasks in the current python environment

• ewoksserver: https://gitlab.esrf.fr/workflow/ewoks/ewoksserver/-/blob/main/src/ewoksserver/app/routes/tasks/discovery.py#L52
• ewoksjob: https://gitlab.esrf.fr/workflow/ewoks/ewoksjob/-/blob/main/src/ewoksjob/apps/ewoks.py#L79
• ewokscore: https://gitlab.esrf.fr/workflow/ewoks/ewokscore/-/blob/main/src/ewokscore/task_discovery.py#L150

As an aside: not sure what the task_type is when discovering like this