Remove Webhooks and Transition to the Event Grid

[oliverspryn]

Webhooks really don't represent the best way of relaying information from one service to another. For this, Azure offers the Event Grid, which allows an event to leverage Azure's full suite of tools.

For this effort, all four of the webhooks should transition to Event Grid output bindings. These events should be triggered under the same conditions and should contain the same pieces of information that the existing webhooks send.

Helpful resources:

• https://docs.microsoft.com/en-us/azure/event-grid/overview
• https://docs.microsoft.com/en-us/azure/azure-functions/functions-bindings-event-grid-output
• https://docs.microsoft.com/en-us/azure/azure-functions/functions-bindings-event-hubs-output

[oliverspryn]

Beginning work on version 2. Version 1 is no longer necessary.