Test Failure: Node v15 issue with Async tests + jest.spyOn

Description of problem:

Per the discussion thread of when I ran into this for the Pipeline package, the issue appears to only show itself up on v15 of node.

Prerequisites (if any, like setup, operators/versions):

None, test issue

Steps to Reproduce

1. Run `frontend/packages/knative-plugin/src/components/overview/_tests_/RevisionsOverviewList.spec.tsx` tests

Actual results:

 RUNS  packages/knative-plugin/src/components/overview/__tests__/RevisionsOverviewList.spec.tsx
node:internal/process/promises:245
          triggerUncaughtException(err, true /* fromPromise */);
          ^
[UnhandledPromiseRejection: This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). The promise rejected with the reason "Error: Target container is not a DOM element.".] {
  code: 'ERR_UNHANDLED_REJECTION'
}

Expected results:

Tests to pass on v15 of node.

Reproducibility (Always/Intermittent/Only Once):

Always on v15, NOT on v14.

Build Details:

71167b267da5907553a88f588b8f16b38cda5585 of master (4.9)

Additional info:

ODC-5824 was the Pipeline issue, fixed in https://github.com/openshift/console/pull/8892

My thoughts at the time:

Fixes up a couple tests so they can work with node-v15 – jest.spyOn invokes the method with no arguments and one of our methods was incorrectly trying to test that a try/catch caught errors and mocked a situation where an undefined Pipeline object was being invoked for .metadata.name