Changed Docker Maven plugin from Spotify to fabric8

[merlimat]

Motivation

The maven plugin com.spotify:dockerfile-maven-plugin that we are using to build Docker images has been discontinued and not supported for quite some time. There are also things that don't work anymore with this plugin, like for example building on M1 Mac with an ARM based JVM.

The suggested replacement is io.fabric8:docker-maven-plugin (https://dmp.fabric8.io) which is actively mantained.

• doc-not-needed

[github-actions]

@merlimat Please provide a correct documentation label for your PR.
Instructions see Pulsar Documentation Label Guide.

[nicoloboschi]

LGTM

[michaeljmarshall]

LGTM

[mattisonchao]

Re-open this PR to rerun the test.

[mattisonchao]

@merlimat Could you please check the failed test?

[eolivelli]

LGTM

[eolivelli]

CI is failing while building the docker image. maybe we have to fine tune this patch

2022-07-29T02:07:11.1326799Z [INFO] ------------------------------------------------------------------------
2022-07-29T02:07:11.1442724Z [ERROR] Failed to execute goal on project pulsar-all-docker-image: Could not resolve dependencies for project org.apache.pulsar:pulsar-all-docker-image:pom:2.11.0-SNAPSHOT: Could not find artifact org.apache.pulsar:pulsar-docker-image:jar:docker-info:2.11.0-SNAPSHOT in apache.snapshots (https://repository.apache.org/snapshots) -> [Help 1]
2022-07-29T02:07:11.1444564Z [ERROR]

cc @lhotari @merlimat