ci/woodpecker/pr/woodpecker Pipeline is pendingDetails
To move more logic to the Uploader modules, it's better to keep the same
`upload` and manipulate that while going through the upload pipeline, so
that's how it's now done.
Since we expect the `upload`, I removed the option for returning just `:ok`
from the uploaders.
It was possible to bypass the logic in the `get_url` function, but that was
unused. Since it makes even less sense when returning `upload`, I removed that
In a later stage I want to return the url from the uploader module, which
should obsolete this function.
I saw a warning from `Pleroma.Upload.Filter.MogrifyTest` which I now fixed.