Update Azure Monitor metrics collection to utilize Managed Prometheus

**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/

Start with the Azure Monitor metrics page at https://docs.dapr.io/operations/observability/metrics/azure-monitor/ and compare its current guidance with the linked Microsoft documentation for Managed Prometheus. Update that page to describe and link to the Managed Prometheus solution instead of the legacy strategy, then verify the rendered documentation and links.

Written by the indexing model from the issue text.