chore: Make integ test run also on synchronize and opened in pull requests

[arangatang]

Summary

Changes

Integ tests are now also executed if code is pushed to a pr and not only on the initial ready for review event.

User experience

• Developers won't have to move from draft to ready to trigger the integ tests
• Integ tests will have to pass before the PR can be merged.

Checklist

If your change doesn't seem to apply, please leave them unchecked.

• I have reviewed the contributing guidelines
• I have performed a self-review of this change
• Changes have been tested
• Changes are documented

Is this a breaking change? (Y/N)

• Yes
• No

Please add details about how this change was tested.

• Did integration tests succeed?
• If the feature is a new use case, is it necessary to add a new integration test case?

Acknowledgment

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[arangatang]

Integ tests are currently failing. Not related to this PR.

[arangatang]

Hmm, there seem to be security issues with on: pull_request in terms of repository secrets.
Github blogpost about this here: https://securitylab.github.com/resources/github-actions-preventing-pwn-requests/
This needs some more work, will move this to draft.