Alerting: With viewers_can_edit enabled the users are not able to create silences

[paulojmdias]

What happened?

Even with viewers_can_edit with the True value, the users can't create silences using Grafana Alerting. We can only achieve that if we give the Editor role to the users.

Discussion started here: https://community.grafana.com/t/allow-viewers-to-silence-their-own-alert/73955

What did you expect to happen?

Users with the Viewer role and configuration viewers_can_edit with the True value can create silences.

Did this work before?

No.

How do we reproduce it?

1. Make the viewers_can_edit with the True value in the configuration.
2. Create a user with the Viewer role.
3. The silence button will not appear in the Alerting -> Silences panel

Is the bug inside a dashboard panel?

No response

Environment (with versions)?

Grafana: 9.5.7
OS: Ubuntu 22
Browser: Chrome

Grafana platform?

Docker

Datasource(s)?

No response