Add the ability to exclude the assignee when creating Responder alerts

Problem Definition

When the Responder alerts feature is enabled, adding responders to an Incident in a Service Project will automatically create an alert in Opsgenie for that responder.

Suggested Solution

The assignees in Jira are already informed about being assigned to a request, and in most cases, the agents assign the incident to themselves, which means they receive notification twice about something they already know.