Produce a BASE Kogito Serverless Workflow Builder Image

Based on this WIP  the outcome should be a base image (please refer to the Dockerfile.base) that will be used to build the final image for a particular Workflow that we would like to instantiate.

In this way we will cache in this image all the base dependencies needed for a Kogito service that will be able to execute a Serverless Workflow, speeding up the build of the final image.

The code for producing this immutable image must be into the kogito-images repository and it will be used by:

• web tools (plain ocp, no operators)
• kn cli (local builds, no java or maven installed locally)
• Kogito Serverless Operator (any k8s flavors)