Support gitlab-shell public_host_key_algorithms config setting

Summary

As a follow-up of gitlab-org/gitlab-shell!986 (merged), we should support the public_host_key_algorithms config setting in charts.

Related to gitlab-org/gitlab-shell#701 (closed)

Versions

• Chart: (tagged version | branch | hash git rev-parse HEAD)
• Platform:
  • Cloud: (GKE | AKS | EKS | ?)
  • Self-hosted: (OpenShift | Minikube | Rancher RKE | ?)
• Kubernetes: (kubectl version)
  • Client:
  • Server:
• Helm: (helm version)
  • Client:
  • Server:

Relevant logs

(Please provide any relevant log snippets you have collected, using code blocks (```) to format)