Add script to update cluster-autoscaler flags doc

Author: rainfd

.pre-commit-config.yaml

@@ -13,3 +13,10 @@ repos:
         files: (README\.md\.gotmpl|(Chart|requirements|values)\.yaml)$
     repo: https://github.com/norwoodj/helm-docs
     rev: v1.3.0
+  - hooks:
+      - id : update-flags
+        name: Update Cluster-Autoscaler Flags Table
+        entry: bash cluster-autoscaler/hack/update-faq-flags.sh
+        language: system
+        files: cluster-autoscaler/main\.go
+    repo: local