* Alerting: Fix access to alerts for viewer with editor permissions when RBAC is disabled (#49270)
* Add folder edit permission for users with Viewer role
* relax permissions required to create an alert when RBAC is disabled
(cherry picked from commit 3dfafbadef)
* fix backend conflict
* fixup
Co-authored-by: Yuriy Tseretyan <yuriy.tseretyan@grafana.com>