Add extra e2e test that exercises some other features

[jeroenheijmans]

The current basic e2e test just boots up the app. The happy-path-flow e2e test will log the user in and out via the login button. This leaves a few components unused in e2e tests:

• The auth-guard.service.ts (so being prevented from going to a protected page)
• The auth-guard-with-forced-login.service.ts (so getting sent off to IDS4 when you go to a protected page)
• The should-login.component.ts page
• and maybe a handful of others too

Let's add 1 more e2e test that tests an extra typical "flow" exercising the above parts.

Note that npm run e2e should run the tests, and these are also run for a PR via GitHub Actions (and nightly for master).

[jeroenheijmans]

It would still be a nice (albeit low-prio) addition to have this, but I've removed hacktoberfest since the repo won't participate in the event per-say.