Provide a Helm chart for Checkly Agent

Is your feature request related to a problem? Please describe.

Checkly agent is great but it is a lot of manual work to get it up and running in my Kubernetes cluster. I need to understand the documentation and then translate this into a Deployment spec and run it in my cluster.

Describe the solution you'd like

I'd like to have a Helm chart, where a new installation would be only three steps:

helm repo add checkly https://charts.checklyhq.com
helm repo update
helm upgrade --install checkly-agent checkly/checkly-agent \
    --set config.api_key='YOUR.AGENT.API.KEY'

or to update to a new version

helm repo update
helm upgrade checkly-agent checkly/checkly-agent --reuse-values

All customizations would happen in a Helm style in a separate values.yaml.

Describe alternatives you've considered

Hand roll it by myself in my cluster. Write my own Helm chart. Use other config management tools like Terraform or Ansible to write the deployment.

original GH issue link https://github.com/checkly/public-roadmap/issues/285