Use assignee sidebar widget in the alert drawer

- update assignee sidebar widget to fit the alert case
  not having a participant query
- update assignee to fit alert mutation not being
  standard
- update alerts to work with widget
- create alert assignees query for use with widget
- alias for response shape to match other
  queries
- alias mutation properties
- update other sidebar component to continue working
- make iid the alert unique identifier
- add tests
- Refactor alert details graphql queries
- removed assignees from the alert.fragment
- created a new alert details query without assignees
  and use it for the threat monitoring alert drawer
- renamed the old alert details query and added
  assignees with the user fragment to it for use just
  in the alert details page, using the user
- added assignees to get alert fragment and use the
  user fragment

Changelog: added
EE: true