Cleanup Jest Test Output (part 4)

[jmchilton]

Builds on and continues the work of #19178 / #19185. The benefits are diminishing. I guess the thing here most likely to affect stability is the mocking change to NotificationForm.test.ts - this seems to eliminate a fetch failure message. I don't know why that fetch failure would affect other tests but the error message looks vaguely related and regardless it is better we aren't doing random fetching against localhost services that don't exist.

How to test the changes?

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• This is a refactoring of components with existing test coverage.
• Instructions for manual testing are as follows:
  1. [add testing steps and prerequisites here if you didn't write automated tests covering all your changes]

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