[fix] Update 360dialog for Cloud API

[mattwr18]

related to https://github.com/tactilenews/100eyes/issues/2026

• [x] Update the base_uri in the application
• [ ] Update the create template enpoint /v1/config/templates
• [x] Add messaging_product to payloads
• [x] Update template payload to remove namespace
• [x] Update webhook format. See https://docs.360dialog.com/partner/integration/webhook-events-and-notifications#messaging-webhook-associated-with-messaging-api