fix: playwright tests cancelled after timeout

[LinHuiqing]

Problem

Playwright tests are wonky and we want to fix them (to some extent) so we can at least have some e2e tests!

Closes #6154

Solution

Fixed several bugs in the playwright tests:

• Correct order for retrieving OTP from email (fixed in 62d2dd1)
• Add missing environment variable which was introduced in fix: add env parameter to Stripe metadata, check value before processing events #6234 (fixed in 0d65ebd and 3af498e)
• Update to getRoleBy combobox when using dropdown for field settings (done in 87c5a40).
• fillMultiDropdown issues:
  • Don't close dropdown between item selections.
  • Scroll options into view if they're not in view.

Issues left to tackle regarding playwright tests:

• Add webkit browser back for playwright tests #6306
• Restore download CSV responses flow to encrypt-submission playwright test suite #6307

For future reference when playwright tests timeout, here is the estimated time taken for a successful run of tests on GitHub Actions (as of this PR):

• login.spec.ts (9 tests): ~ 1 min
• encrypt-submission.spec.ts (15 tests): ~ 18 min
• email-submission.spec.ts (5 tests): ~ 10 min

Breaking Changes

• No - this PR is backwards compatible

Features:

• Details ...

Improvements:

• Details ...

Bug Fixes:

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[LinHuiqing]

Oh btw the changes here corrects the retrieving of OTP emails a bit:

return inbox.filter(filterFn).sort((a, b) => a.time - b.time)

^this corrects the sorting of emails to ascending order of time! so that we can get the latest email when we use pop (not sure why this bug has survived so long?? maybe because we've just been deleting all the other emails)

await MAIL_CLIENT.deleteById(lastEmail.id)

^I removed the deleting of emails by client because... I don't think its needed? and its easier for debugging if we have all the emails in the inbox

[LinHuiqing]

Closing in favour of a clean PR at #6308