API for retrieving submission files with Reviewer role

[jardakotesovec]

Describe the issue

While working on new #7495. Having reviewer role I need to be able to see submission files that are assigned for review.

Per my understanding these files would have fileStage=4 (SUBMISSION_FILE_REVIEW_FILE) and would be associated via reviews_files, because available files can be cherry picked when assigning reviewer.

Proposed solution
It seems reasonable to be able to retrieve these files from existing endpoint

api/v1/submissions/10/files?fileStages=4&reviewRoundId=8

Currently I don't get access to this endpoint at all as reviewer.

But maybe additionally pass reviewAssignmentId or reviewId? As there should be explicit information that it needs to be for that particular review.

What application are you using?
OJS, OMP or OPS version 3.5

[ewhanson]

There are still some things being sorted out, but this is quite similar to #9963 and could generally follow the same pattern/approach I suspect.