Unable to specify Maintenance Window and Maintenance Exclusions in GKE cluster

[Kun483]

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/kind feature

Describe the solution you'd like I think there is no evident place to specify Maintenance Window and Maintenance Exclusions.

I followed clusterctl guide to create a GKE cluster. Reference: https://cluster-api-gcp.sigs.k8s.io/topics/gke/creating-a-cluster.

kind create cluster
export EXP_CAPG_GKE=true
export EXP_MACHINE_POOL=true
clusterctl init --infrastructure gcp

Then I applied the cluster template from https://github.com/kubernetes-sigs/cluster-api-provider-gcp/blob/v1.6.1/templates/cluster-template-gke.yaml.

What did you expect to happen: I expect we to have the some options to set maintenancePolicy like startTime, endTime, and frequency.

Anything else you would like to add:

Environment

• Cluster-api version: v1.7.3
• CAPG version: v1.6.1
• Kubernetes version: (use kubectl version): Kustomize Version: v5.0.4-0.20230601165947-6ce0bf390ce3 Server Version: v1.29.5-gke.1091000