Update Azure Monitor metrics collection to utilize Managed Prometheus

[fabistb]

What content needs to be modified?
https://docs.dapr.io/operations/observability/metrics/azure-monitor/ describes the azure monitor metric scraping.

Based on my understanding this describes the legacy strategy to send Prometheus metrics from a Kubernetes cluster to a Log Analytics workspace.
https://learn.microsoft.com/en-us/azure/azure-monitor/containers/container-insights-prometheus-logs?tabs=cluster-wide

Describe the solution you'd like
Update the documentation and point to the Managed Prometheus solution instead:
https://learn.microsoft.com/en-us/azure/azure-monitor/containers/kubernetes-monitoring-enable?tabs=azure-cli

Where should the new material be placed?
https://docs.dapr.io/operations/observability/metrics/azure-monitor/