add manage_remote_clusters permission (#16252)

app/app_test.go

@@ -181,6 +181,7 @@ func TestDoAdvancedPermissionsMigration(t *testing.T) {
 		"system_admin": allPermissionIDs,
 	}
 	assert.Contains(t, allPermissionIDs, model.PERMISSION_MANAGE_SHARED_CHANNELS.Id, "manage_shared_channels permission not found")
+	assert.Contains(t, allPermissionIDs, model.PERMISSION_MANAGE_REMOTE_CLUSTERS.Id, "manage_remote_clusters permission not found")
 
 	// Check the migration matches what's expected.
 	for name, permissions := range expected1 {