UDP Wizard: allow output format selection

[jdries]

In the UDP wizard, which can be triggered like this:
https://editor.openeo.org/?wizard=UDP&wizard~process=fusets_mogpr&wizard~processUrl=https://raw.githubusercontent.com/ESA-APEx/apex_algorithms/refs/heads/main/algorithm_catalog/vito/fusets_mogpr/openeo_udp/fusets_mogpr.json&server=https://openeofed.dataspace.copernicus.eu

It is possible to immediately execute the process as batch or synchronous job.
When the UDP however returns a rastercube, the actual output format is left unspecified, and the backend has to make a best effort guess.

It would improve the user experience if the wizard would detect that a raster cube is returned by the UDP, and thus suggest available output formats, automatically adding the required 'save_result' process before triggering execution.

Note that our UDP's do not typically include save_result, because that would make them harder to use as part of a larger process graph. It would be possible to conditionally add save_result, but that would increase complexity for UDP authors.