Unit test redirectToEditItem is flaky

[lgeggleston]

Describe the bug

The redirectToEditItem test in the submission service test suite has been especially flaky, sometimes failing multiple times in a row on the same code before succeeding.

FAILED TESTS:
  SubmissionService test suite
    redirectToEditItem
      ✖ should redirect to Item page
        Chrome Headless 147.0.0.0 (Linux x86_64)
      Error: <spyOn> : findById has already been spied upon
      Usage: spyOn(<object>, <methodName>)
      Error: <spyOn> : findById has already been spied upon
      Usage: spyOn(<object>, <methodName>)
          at <Jasmine>
          at UserContext.apply (src/app/submission/submission.service.spec.ts:1006:7)
          at UserContext.apply (node_modules/zone.js/fesm2015/zone-testing.js:1715:26)
          at _ZoneDelegate.invoke (node_modules/zone.js/fesm2015/zone.js:398:28)
          at ProxyZoneSpec.onInvoke (node_modules/zone.js/fesm2015/zone-testing.js:2132:39)
          at _ZoneDelegate.invoke (node_modules/zone.js/fesm2015/zone.js:397:34)
          at ZoneImpl.run (node_modules/zone.js/fesm2015/zone.js:113:43)
          at runInTestZone (node_modules/zone.js/fesm2015/zone-testing.js:216:38)

To Reproduce

It can be observed on various recent PR test runs. Example

Expected behavior

It would be best to re-evaluate this test to see if anything could make it less flaky, or whether it would make sense to disable the test entirely.