Merge "Update cluster autoscaler build for v1.22"

Author: Zuul

dockerfiles/cluster-autoscaler/Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.13.10 as builder
+FROM golang:1.16.7 as builder
 
 ARG AUTOSCALER_VERSION
 

playbooks/container-builder-vars.yaml

@@ -24,8 +24,8 @@ helm_versions:
   - version: v3.2.0
 
 cluster_autoscaler_versions:
-  - version: 1.16.5
-  - version: 1.17.3
-  - version: 1.18.2
-  - version: 1.19.0
+  - version: 1.18.3
+  - version: 1.19.1
   - version: 1.20.0
+  - version: 1.21.0
+  - version: 1.22.0