Use new bmw dart api tool

[robert-northmind]

Is your feature request related to a problem? Please describe.
When publishing a new version of our packages, there is always a risk of accidently breaking an API.
So better safe guard against this there are some tools out there which can help.

Describe the solution you'd like
BMW just published a new open source tool (developed by core team) which does exactly this.
You can run it in your CI pipeline and it checks that any new code setup is not breaking an API according to semantic versioninng.

Here is a link to the new tool
https://github.com/bmw-tech/dart_apitool

We could integrate this into our pipeline.