Enable standard AAD authentication for Azure EventGrid binding component, specifically on the output binding (create)

[bb33f]

Describe the feature

Currently, it appears that the Azure EventGrid output binding supports authentication with AccessKey only. It is preferable to enable all of the standard AAD authentication methods described in https://docs.dapr.io/developing-applications/integrations/azure/azure-authentication/authenticating-azure/.

Current Work-Around:

1. Configure an Azure Key Vault secrets component using the AAD authentication method of choice (preferably a managed identity).
2. Add a KV secret containing the EventGrid access key.
3. Configure the EventGrid binding component with accessKey using a secretKeyRef to retrieve the value via the KV secrets component.

Release Note

RELEASE NOTE:

[ItalyPaleAle]

I agree this should be improved.