Fix broken GET submission endpoint

[naglepuff]

Partial Fix #1150

Fix #1148

Using ** to pass kwargs proved to be unreliable, resulting in an inability to open submissions on the submission portal.

To reproduce the issue locally I restored the most recent backup from NERSC CFS and ran

docker-compose pull
docker-compose up

Logged in as an admin user, I was unable to open any submissions until applying the changes.

While testing, I noticed a bug that would wipe out submission roles on migration. In order to stop this, SubmissionRole is now carried over in the same way that UserLogins and SubmissionMetadatas are. In order to fully fix that issue, I would propose re-running the migration. Or performing the query:

insert into submission_role
select id, author_orcid, 'owner'::submissioneditorrole from submission_metadata;

in dev, since recent migrations have already wiped out that table.