[SDK-Bindings - EventGrid] Implement converter in EventGrid worker extension

[aishwaryabh]

Problem Statement

Implement EventGridConverter trigger binding types CloudEvent, CloudEvent[], EventGridEvent, EventGridEvent[], BinaryData, BinaryData[], and String[] so that we have parity with in-proc.

Tasks

• Implement converter that enables binding to a single CloudEvent, EventGridEvent, string and BinaryData and multiple CloudEvent's, EventGridEvent, string, and BinaryData
  • Being able to bind to multiple table entities looks like this: CloudEvent[], EventGridEvent[], BinaryData[], String[]
• Write unit tests for converters

Definition of Done

1. Worker EventGrid extension package is released (as a preview package)
2. Unit & E2E tests written and checked-in
3. Microsoft documentation updated to detail support for the new SDK-bindings