Chore: use org service methods (#55768)

* Chore: use org service methods

* fix tests

* fix errors

* adjust func signatures for getbyname

* 💩

* Use the same fake service to get the user in AC and in HS

* Fix middleware test

* Fix more middleware test

* Fix api tests

Co-authored-by: gamab <gabi.mabs@gmail.com>
Co-authored-by: Ida Furjesova <ida.furjesova@grafana.com>

pkg/services/provisioning/plugins/plugin_provisioner_test.go

@@ -5,6 +5,8 @@ import (
 	"errors"
 	"testing"
 
+	"github.com/grafana/grafana/pkg/services/org"
+	"github.com/grafana/grafana/pkg/services/org/orgtest"
 	"github.com/grafana/grafana/pkg/services/pluginsettings"
 
 	"github.com/grafana/grafana/pkg/infra/log"
@@ -34,7 +36,9 @@ func TestPluginProvisioner(t *testing.T) {
 		}
 		reader := &testConfigReader{result: cfg}
 		store := &mockStore{}
-		ap := PluginProvisioner{log: log.New("test"), cfgProvider: reader, store: store, pluginSettings: store}
+		orgMock := orgtest.NewOrgServiceFake()
+		orgMock.ExpectedOrg = &org.Org{ID: 4}
+		ap := PluginProvisioner{log: log.New("test"), cfgProvider: reader, pluginSettings: store, orgService: orgMock}
 
 		err := ap.applyChanges(context.Background(), "")
 		require.NoError(t, err)