Change: Use docker/meta-action for container tags and labels

[bjoernricks]

What:

Use the docker/meta-action for setting container labels and tags. This action is much more flexible then our own container-image-tags action.

Also build container images in pull requests to ensure not breaking the container images in PRs.

DEVOPS-353

Why:

How:

Checklist:

• [ ] Tests
• [ ] CHANGELOG Entry