Fix alerts for post-community-tempelis-apply
Fix alerts for post-community-tempelis-apply

The alert options for testgrid are non-intuitive. This matches the
setup used by the k/org peribolos postsubmit

GoogleCloudPlatform/testgrid,GoogleCloudPlatform/testgrid,GoogleCloudPlatform/testgrid,GoogleCloudPlatform/testgrid,GoogleCloudPlatform/testgrid,GoogleCloudPlatform/testgrid