Add support for building on ARM64 (and Apple Silicon).

[chrismoos]

From my testing, I was able to build Confluent ZK and Kafka images using the changes here as the base image and it seemed to run fine, natively, on an Apple M1 machine.

This would resolve #117 and confluentinc/kafka-images#80.

NOTE: Probably the PR on this branch isn't the best, but I was unable to test locally against any newer versions as the various Confluent artifacts for versions > 7.0.1 were not found in https://packages.confluent.io/maven/.

Changes

• Update Zulu version to multiarch (ARM supported one)
• Remove dockerfile-maven-plugin building -- there is an upstream issue with building on ARM (FFI issue raspberry pi mvn dockerfile:build fail spotify/dockerfile-maven#367)

Testing

I pushed the base, ZK, and Kafka images if you want to test:

• chrismoos/cp-kafka:7.0.1
• chrismoos/cp-base-new:7.0.1-ubi8
• chrismoos/cp-zookeeper:7.0.1

[andrewegel]

Remove dockerfile-maven-plugin building -- there is an upstream issue with building on ARM (FFI issue spotify/dockerfile-maven#367)

Yeah this is why we can't take this change - This is too large of a refactor to take within a release. We are in the process of building ARM64 images using the dockerfile-maven plugin on native ARM64 systems to spit out ARM64 images - Its not the most efficient, but it doesn't require a large re-write like you're doing here.

[chrismoos]

@andrewegel Okay, thanks for the details. Looking forward to some official builds from you guys then. :)