provide darwin builds of the compliance kubectl plugin

[davidkarlsen]

docker run --platform darwin/amd64 --rm -v ~/.local/bin:/mnt/out:Z registry.redhat.io/compliance/oc-compliance-rhel8 /bin/cp /usr/bin/oc-compliance /mnt/out/

Unable to find image 'registry.redhat.io/compliance/oc-compliance-rhel8:latest' locally
latest: Pulling from compliance/oc-compliance-rhel8
docker: no matching manifest for darwin/amd64 in the manifest list entries.
See 'docker run --help'.