Upgrade `component-grafana-helm` from `v2.x` to `v3.x`

Version 3.x changes the way the Helm chart is configured.

If you have not configured a Helm chart version manually, you do not need to change anything.

Helm chart definition

`v2.x`

parameters:
  grafana_helm:
    charts:
      grafana: 11.2.3

`v3.x`

parameters:
  grafana_helm:
    charts:
      grafana:
        source: https://grafana-community.github.io/helm-charts
        version: 11.2.3