New: K8s Kafka add-on + update to tosca-types v2.8.0

assigned to @mgattari

added 14 commits

• afb42bd2...d84e3fef - 13 commits from branch master
• d6ad7225 - Merge branch 'master' into 'k8s-kafka'

Compare with previous version

assigned to @antonacci and unassigned @mgattari

mentioned in commit f7d5a591

merged