Frontend topics related to release-jobs

[despadam]

• Discuss with site that uses the files property whether changing

 job.datasetList = {
              pid: "",
              files: [],
            }

to job.datasetIds = ["pid1", "pid2" ] would still work for them (see src/app/datasets/admin-tab/admin-tab.component.ts)

• JobClass extends OwnableClass, but is field isPublished needed for a job?

• Should ownerUser in the Job schema be renamed to owner (to match Dataset.owner) and should it be required?

• Up to now I think the backend was backwards-compatible with v3. We should clearly indicate in the README that it requires scicat-backend-next.

_Originally posted by @sbliven in #1585

[despadam]

Actions:

• We mark isPublished fields as optional in the fe
• Preserve the ownerUser field in Job Schema, as it checked and must be a valid SciCat user, while the owner in the Dataset schema can be any string. Naming them differently signifies this difference. Lastly, ownerUser should be a required field
• Roll back to using datasetList

[sofyalaski]

I think the logic was that the ownerUser is not a required property. For instance, admin can create a job for someone and it need not be restricted to a specific user but just a group.

[despadam]

PR: #1616

[despadam]

TODO: #1619