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/services/libraryelements/libraryelements_get_test.go

@@ -5,6 +5,7 @@ import (
 
 	"github.com/google/go-cmp/cmp"
 	"github.com/grafana/grafana/pkg/components/simplejson"
+	"github.com/grafana/grafana/pkg/services/org"
 	"github.com/grafana/grafana/pkg/web"
 	"github.com/stretchr/testify/require"
 
@@ -183,7 +184,7 @@ func TestGetLibraryElement(t *testing.T) {
 	scenarioWithPanel(t, "When an admin tries to get a library panel that exists in an other org, it should fail",
 		func(t *testing.T, sc scenarioContext) {
 			sc.reqContext.SignedInUser.OrgId = 2
-			sc.reqContext.SignedInUser.OrgRole = models.ROLE_ADMIN
+			sc.reqContext.SignedInUser.OrgRole = org.RoleAdmin
 
 			// by uid
 			sc.ctx.Req = web.SetURLParams(sc.ctx.Req, map[string]string{":uid": sc.initialResult.Result.UID})