Chore: Port user services to identity.Requester (#73851)

* port api key api to signedinuser

* port users to signed in user interface

* fix tests

pkg/services/apikey/model.go

@@ -4,9 +4,9 @@ import (
 	"errors"
 	"time"
 
+	"github.com/grafana/grafana/pkg/services/auth/identity"
 	"github.com/grafana/grafana/pkg/services/org"
 	"github.com/grafana/grafana/pkg/services/quota"
-	"github.com/grafana/grafana/pkg/services/user"
 )
 
 var (
@@ -50,7 +50,7 @@ type DeleteCommand struct {
 type GetApiKeysQuery struct {
 	OrgID          int64
 	IncludeExpired bool
-	User           *user.SignedInUser
+	User           identity.Requester
 }
 type GetByNameQuery struct {
 	KeyName string