Merge branch 'extract_auto_deploy_into_base_image' into 'master'

Extract Auto DevOps deploy functions in a base image

Closes #50286

See merge request gitlab-org/gitlab-ce!30404

changelogs/unreleased/extract_auto_deploy_into_base_image.yml

+---
+title: Extract Auto DevOps deploy functions into a base image
+merge_request: 30404
+author:
+type: changed

lib/gitlab/ci/templates/Auto-DevOps.gitlab-ci.yml

@@ -50,9 +50,6 @@ variables:
   POSTGRES_DB: $CI_ENVIRONMENT_SLUG
   POSTGRES_VERSION: 9.6.2
 
-  KUBERNETES_VERSION: 1.11.10
-  HELM_VERSION: 2.14.0
-
   DOCKER_DRIVER: overlay2
 
   ROLLOUT_RESOURCE_TYPE: deployment