ci: Temporarily remove arm64 builds

It's been a reasonable time that we're not able to even build arm64
artefacts.

For now I am removing the builds as it doesn't make sense to keep
running failing builds, and those can be re-enabled once we have arm64
machines plugged in that can be used for building the stuff, and
maintainers for those machines.

The `arm-jetson-xavier-nx-01` is also being removed from the runners.

Signed-off-by: Fabiano Fidêncio <fabiano.fidencio@intel.com>

tools/packaging/release/release.sh

@@ -142,7 +142,7 @@ function _publish_multiarch_manifest()
 		for tag in ${IMAGE_TAGS[@]}; do
 			docker manifest create ${registry}:${tag} \
 				--amend ${registry}:${tag}-amd64 \
-				--amend ${registry}:${tag}-arm64 \
+	#			--amend ${registry}:${tag}-arm64 \
 				--amend ${registry}:${tag}-s390x \
 				--amend ${registry}:${tag}-ppc64le