Zanzana: Remove usage from legacy access control (#98883)

* Zanzana: Remove usage from legacy access control

* remove unused

* remove zanzana client from services where it's not used

* remove unused metrics

* fix linter

pkg/services/publicdashboards/api/common_test.go

@@ -18,7 +18,6 @@ import (
 	"github.com/grafana/grafana/pkg/infra/log"
 	"github.com/grafana/grafana/pkg/plugins"
 	"github.com/grafana/grafana/pkg/services/accesscontrol/acimpl"
-	"github.com/grafana/grafana/pkg/services/authz/zanzana"
 	"github.com/grafana/grafana/pkg/services/contexthandler/ctxkey"
 	contextmodel "github.com/grafana/grafana/pkg/services/contexthandler/model"
 	"github.com/grafana/grafana/pkg/services/datasources"
@@ -56,7 +55,7 @@ func setupTestServer(
 	// build router to register routes
 	rr := routing.NewRouteRegister()
 
-	ac := acimpl.ProvideAccessControl(featuremgmt.WithFeatures(), zanzana.NewNoopClient())
+	ac := acimpl.ProvideAccessControl(featuremgmt.WithFeatures())
 
 	// build mux
 	m := web.New()