Extend provenance-check integration test

[fridex]

Is your feature request related to a problem? Please describe.

As of now, we have only one test covering provenance-checks. It would be great to cover also negative scenarios:

• when a hash of an artifact is adjust
• when hash of Pipfile is adjusted
• see https://thoth-station.ninja/docs/developers/adviser/provenance_checks.html for other possible checks

NOTE: this is tested on unit test level so no need to have very specific integration tests for this, but might be a good idea to make sure provenance checks are operational.