Support querying metrics for multiple resources

[srnagar]

We have azmcp monitor metrics query command to support querying metrics for a single Azure resources. Extend this command/add new command to support querying metrics for multiple Azure resources.

Note: Azure.Monitor.Query.Metrics library supports this feature.

[github-actions]

Thanks for the feedback! We are routing this to the appropriate team for follow-up. cc @jongio @smritiy @srnagar @zaaslam.