Migrate task forms to use jsonforms

[aaronchongth]

Copied over from #984, as this has a larger impact and involves rewrites and migrations.

Remove reliance on hard coded task forms. Current plan is to introduce something on top of a task, called a "mission". A mission definition will include the inputs, a ui schema and a json document with json reference that defines how to convert the inputs into a RMF task. This conversion will be done by the api-server and the frontend will only work with missions.

Notes:

• implement tooltips for each type of task too, where the schemas can be described

Resolves #684