Adding Alerts and Action Groups in monitoring resources

The aim of this MR is to add the configuration blocks for action groups and log alerts in the monitoring resources. As an example, data for CPU Soft Limit alert for storage service is presented in terraform.tfvars file.

At deployment time, this data can be used as reference and copied to custom.tfvars file after editing personal information like email address of email receivers, etc.

The MR addresses this issue - #150 (closed)

For further context, design document can be found here - SharePoint

Sample POC can be found here to run locally - Gitlab