Provide support for scraping metrics for Azure Event Grid

[tomkerkhove]

Provide support for scraping metrics for Azure Event Grid

[tomkerkhove]

Metrics are available here:

• https://docs.microsoft.com/en-us/azure/azure-monitor/platform/metrics-supported#microsofteventgriddomains
• https://docs.microsoft.com/en-us/azure/azure-monitor/platform/metrics-supported#microsofteventgrideventsubscriptions
• https://docs.microsoft.com/en-us/azure/azure-monitor/platform/metrics-supported#microsofteventgridextensiontopics
• https://docs.microsoft.com/en-us/azure/azure-monitor/platform/metrics-supported#microsofteventgridpartnernamespaces
• https://docs.microsoft.com/en-us/azure/azure-monitor/platform/metrics-supported#microsofteventgridpartnertopics
• https://docs.microsoft.com/en-us/azure/azure-monitor/platform/metrics-supported#microsofteventgridsystemtopics
• https://docs.microsoft.com/en-us/azure/azure-monitor/platform/metrics-supported#microsofteventgridtopics

Yikes!