[RFE] New CPU & memory detectors for App Service Plan

[BzSpi]

What is the module?
integration_azure-app-service-plan

Is your feature request related to a known monitoring hole? Please describe.
Current CPU & memory detectors are configured on the Instance dimension. However, we should be able to monitor if only an instance is over-used (with high thresholds) and also if the average CPU & memory usage is high on the whole service.
Those 2 detectors have different remediation tasks. Either fix the unhealthy instance or scale the service.

Describe the solution you'd like
Having two sets of detectors with different dimensions and thresholds for memory & CPU.