Add e2e tests to static QR code

(Please check that I set up this MR correctly before merging)

Since this is the first test suite of Initiative B, I just followed my part of the user journey and added all the necessary tests, even if they're not relevant to static QR codes specifically (like testing the calendar file download). Once we add more Initiative B tests, we can move those tests to their own respective files. That's also why the calendar file download test is a bit rudimentary at the moment (might use similar functionality as the backup/restore test in the future).

Tested locally on port 4202: yarn cypress open --config baseUrl=https://localhost:4202/

Must add MockRccPublicRuntimeConfigModule to PAT RccBaseFeaturesModule for it to work.