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/models/search.go

@@ -4,6 +4,7 @@ import (
 	"strings"
 
 	"github.com/grafana/grafana/pkg/services/sqlstore/searchstore"
+	"github.com/grafana/grafana/pkg/services/user"
 )
 
 type SortOption struct {
@@ -22,7 +23,7 @@ type SortOptionFilter interface {
 type FindPersistedDashboardsQuery struct {
 	Title         string
 	OrgId         int64
-	SignedInUser  *SignedInUser
+	SignedInUser  *user.SignedInUser
 	IsStarred     bool
 	DashboardIds  []int64
 	DashboardUIDs []string