GKE bootstrap script doesn't properly work with Helm 3.x

Summary

When running a GKE bootstrap script with Helm 3.x installed, we have an error during installation:

Error: unknown flag: --wait

This happens due to https://gitlab.com/gitlab-org/charts/gitlab/blob/master/scripts/gke_bootstrap_script.sh#L84. In Helm 3.0 init command was removed

If we comment this row, we will have a following error:

Error: no repositories found. You must add one before updating

To fix this, we need to run:

helm repo add stable https://kubernetes-charts.storage.googleapis.com

Current behavior

Running a script results in an error

Expected behavior

Script should successfully create a GKE cluster

Versions

• Chart: latest
• Platform:
  • Cloud: GKE
• Kubernetes: (kubectl version)
  • Client: 1.17.3
  • Server: 1.14.10
• Helm: (helm version)
  • Client: 3.1.1
  • Server: 3.1.1