Docs: Make role definitions more precise (#102391)

* fix missing clarification

* remove OnCall admonitions

docs/sources/administration/roles-and-permissions/access-control/rbac-fixed-basic-role-definitions/index.md

@@ -50,7 +50,7 @@ refs:
 Available in [Grafana Enterprise](/docs/grafana/<GRAFANA_VERSION>/introduction/grafana-enterprise/) and [Grafana Cloud](/docs/grafana-cloud).
 {{% /admonition %}}
 
-The following tables list permissions associated with basic and fixed roles.
+The following tables list permissions associated with basic and fixed roles. This does not include basic role assignments added by plugins or apps.
 
 ## Basic role assignments
 
@@ -165,16 +165,7 @@ There is only one exclusion at this moment. Role `fixed:alerting.provisioning:wr
 
 For more information about the permissions required to access alert rules, refer to [Create a custom role to access alerts in a folder](ref:plan-rbac-rollout-strategy-create-a-custom-role-to-access-alerts-in-a-folder).
 
-### Grafana OnCall roles (beta)
-
-{{% admonition type="note" %}}
-Available from Grafana 9.4 in early access.
-{{% /admonition %}}
-
-{{% admonition type="note" %}}
-This feature is behind the `accessControlOnCall` feature toggle.
-You can enable feature toggles through configuration file or environment variables. See configuration [docs](/docs/grafana/<GRAFANA_VERSION>/setup-grafana/configure-grafana/#feature_toggles) for details.
-{{% /admonition %}}
+### Grafana OnCall roles
 
 If you are using [Grafana OnCall](ref:oncall), you can try out the integration between Grafana OnCall and RBAC.
 For a detailed list of the available OnCall RBAC roles, refer to the table in [Available Grafana OnCall RBAC roles and granted actions](ref:available-grafana-oncall-rbac-roles--granted-actions).