Add script to run tests against prod DB

[nils-wisiol]

The revert commit is necessary to make it work. Without, the script reproduces the bug we saw in prod.

Usage: ./run-api-tests-stack.sh [--no-build] [--keep] [--docker] [--prod-db] [--prod-user USER] [--prod-host HOST] [--refresh-prod-db]
  --no-build  Skip docker image build step
  --keep      Do not tear down containers/volumes after tests
  --docker    Run API tests inside the api container (CI-style)
  --prod-db   Download a logical dbapi dump from production and load it locally
  --prod-user SSH username for prod (default: root)
  --prod-host SSH hostname for prod (default: desec.io)
  --refresh-prod-db  Re-download prod db dump even if cache exists

[peterthomassen]

lgtm!