The charmcraft issues that forced us to use destructive mode are now fixed.

This commit installs jinja2 (an install dependency of charmed-kubeflow-chisme) as a binary 
to avoid running into the build time issues described in canonical/bundle-kubeflow#883.

Part of canonical/bundle-kubeflow#883

* refactor: use k8s_service_info lib instead of SDI

Use the k8s_service_info for receiving the MLMD GRPC Service info instead of using
the SDI, as it will stop being supported soon.
This commit also ensures that mlmd runs with trust=True in the
integration tests.

Fixes #413