* add FGAC actions for silences table
* redirect users without permissions
* add permissions checks to routes
* add fgac to notifications and contact points
* fgac for notification policies
* fix mute timing authorization
* use consistent naming for checking grafana alertmanager
* tests for fgac in contact points and notification policies
* bump up timeout on rule editor test
* use new permissions util
* break out route evaluation into util
* Remove test timeout
* Change permissions for the alert-notifiers endpoint
* Use signed in handler for alert-notifiers when unified alerting enabled
Co-authored-by: Konrad Lalik <konrad.lalik@grafana.com>
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