RBAC: Add origin column to seed_assignment (#80326)

* RBAC: Add origin column to seed_assignment

* Add OnCall permission migration

pkg/services/accesscontrol/pluginutils/utils.go

@@ -60,6 +60,22 @@ func ToRegistrations(pluginID, pluginName string, regs []plugins.RoleRegistratio
 	return res
 }
 
+// PluginIDFromName extracts the plugin ID from the role name
+func PluginIDFromName(roleName string) string {
+	if !strings.HasPrefix(roleName, ac.PluginRolePrefix) {
+		return ""
+	}
+
+	pluginID := strings.Builder{}
+	for _, c := range roleName[len(ac.PluginRolePrefix):] {
+		if c == ':' {
+			break
+		}
+		pluginID.WriteRune(c)
+	}
+	return pluginID.String()
+}
+
 func roleName(pluginID, roleName string) string {
 	return fmt.Sprintf("%v%v:%v", ac.PluginRolePrefix, pluginID, strings.Replace(strings.ToLower(roleName), " ", "-", -1))
 }