cmd/coorindator: ignore pod cleanup if Kubernetes is unavailable

* if Kubernetes init fails, don't attempt to clean existing pods
* TODOs for disabling kubePool

Updates golang/go#12546

Change-Id: I392f6cc4af31fdf307e5aa907a243ff7f5a98b00
Reviewed-on: https://go-review.googlesource.com/17104
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2 files changed