CI should run Ballista integration tests

**Is your feature request related to a problem or challenge? Please describe what you are trying to do.**
We are seeing PRs merged that cause regressions in Ballista because we currently rely on manual integration testing.

**Describe the solution you'd like**
CI should run the integration tests:

```bash
./dev/integration-tests.sh
```

**Describe alternatives you've considered**
None

**Additional context**
None