Fix flaky "Wait For Netlify" step

[benhammondmusic]

When updating PRs that affect the frontend, we have a series of GitHub actions that:

• wait for the auto-generated deployment preview that Netlify makes
• extract that URL and then use it as the target for our E2E tests to make sure that the PR in question doesn't break any of our expected test conditions with Playwright

However, that step has been getting flakier and flakier recently, and seems to fail on the initial run most times. Manually re-running the failed test within the github actions tab works and then the e2e tests can run as needed

We need to debug why it's flaky; it may be because we are relying on an outdated 3rd party action which is using deprecated methods (jakepartusch/wait-for-netlify-action@v1.4); either updating that to a newer identical version or re-creating the 3rd party action ourselves might work.

This is the step that is flaky and failing on the first run usually:

# in .github/workflows/runFrontendTests.yml

  tests_e2e_netlify_prepare:
    name: Wait for Netlify deploy
    runs-on: ubuntu-latest
    if: github.event_name == 'pull_request'
    steps:
      - name: Waiting for "Success" from Netlify Preview
        uses: jakepartusch/wait-for-netlify-action@v1.4
        id: waitFor200
        with:
          site_name: ${{env.NETLIFY_SITE_NAME}}
          max_timeout: 90