Move SignedInUser to user service and RoleType and Roles to org (#53445)

* Move SignedInUser to user service and RoleType and Roles to org

* Use go naming convention for roles

* Fix some imports and leftovers

* Fix ldap debug test

* Fix lint

* Fix lint 2

* Fix lint 3

* Fix type and not needed conversion

* Clean up messages in api tests

* Clean up api tests 2

pkg/plugins/manager/loader/loader.go

@@ -22,6 +22,7 @@ import (
 	"github.com/grafana/grafana/pkg/plugins/manager/loader/finder"
 	"github.com/grafana/grafana/pkg/plugins/manager/loader/initializer"
 	"github.com/grafana/grafana/pkg/plugins/manager/signature"
+	"github.com/grafana/grafana/pkg/services/org"
 	"github.com/grafana/grafana/pkg/setting"
 	"github.com/grafana/grafana/pkg/util"
 )
@@ -225,7 +226,7 @@ func (l *Loader) readPluginJSON(pluginJSONPath string) (plugins.JSONData, error)
 
 	for _, include := range plugin.Includes {
 		if include.Role == "" {
-			include.Role = models.ROLE_VIEWER
+			include.Role = org.RoleViewer
 		}
 	}