Resubmit cancelled/deleted jobs

[zerolab]

Fixes #26

• adds a view to "retry" cancelled or deleted jobs. The retry is more "create a new job" as the API doesn't have anything in this regard
• while the template uses a form, didn't go the full Django form way as we don't need additional validation
• uses a separate view rather then the ModelViewSet CopyView because of various hoops and rabbit holes that introduces

To-Do:

• add additional checks
• link to the view from the translation page message
• retry view tests (permissions, post)
• stretch: look at surfacing cancellation reason in the report, if possible could not find a sensible way to do this

[stevejalim]

Heya @zerolab - not chasing you, but if you want me to take a look at this now, do let me know. Don't want you to be blocked waiting for review from me

[zerolab]

🤦‍♂️ I was so convinved I've pinged you to take this for a test. Please do.
Will push the test today/tomorrow

[stevejalim]

Test driven locally and it's lovely to use. Thank you for this @zerolab - I'm sure it will help me recover well from any process-related footguns I cause :)

[stevejalim]

That's an r+ from me!

Thanks for this addition @zerolab - we really appreciate it and it'll be very useful!

[zerolab]

argh, did not get the notification and re-requested your review after you reviewd it.
Will merge and submit the description callback PR (somehow missed that) and I think that is all on the list