ci: run e2e and integration tests only when api-service or dashboard changes

[gulfaraz]

Describe your changes

The e2e and integration tests must only run when we change the dashboard or API-service.

Checklist before requesting a review

• I have performed a self-review of my code
• I have added tests wherever relevant
• I have made sure that all automated checks pass before requesting a review

[jannisvisser]

looks good from code. If you can confirm that it works as expected functionally (runs if something changed, and not if nothing changed), then approved. UPDATE: I can see the latter case confirmed in this PR I guess, as they haven't run here.)

[jannisvisser]

@gulfaraz actually 1 more comment. The integration tests are not dependent on ibf-dashboard changes right. They only test backend api-calls.

[jannisvisser]

see comment in PR

[gulfaraz]

@jannisvisser You are right. I've updated the workflow accordingly.