Add kube-up/down and dump logs dependencies to KRTE
Add kube-up/down and dump logs dependencies to KRTE

The recently-released GCE deployer for kubetest2 will be run
in KRTE containers in CI. KRTE is currently missing a couple of
necessary dependencies:

The deployer calls out to kube-up.sh, which needs gcloud alpha
and beta components.

The deployer also uses a log dumping script which relies on
gcloud compute ssh and scp. This adds a necessary SSH client.

michelle192837/test-infra,monopole/test-infra,monopole/test-infra,cblecker/test-infra,dims/test-infra,fejta/test-infra,cjwagner/test-infra,kubernetes/test-infra,jessfraz/test-infra,brahmaroutu/test-infra,jessfraz/test-infra,fejta/test-infra,brahmaroutu/test-infra,BenTheElder/test-infra,kubernetes/test-infra,BenTheElder/test-infra,jessfraz/test-infra,cjwagner/test-infra,dims/test-infra,monopole/test-infra,cblecker/test-infra,BenTheElder/test-infra,kubernetes/test-infra,fejta/test-infra,michelle192837/test-infra,brahmaroutu/test-infra,brahmaroutu/test-infra,dims/test-infra,cblecker/test-infra,kubernetes/test-infra,michelle192837/test-infra,pwittrock/test-infra,cblecker/test-infra,monopole/test-infra,michelle192837/test-infra,dims/test-infra,BenTheElder/test-infra,jessfraz/test-infra,BenTheElder/test-infra,brahmaroutu/test-infra,dims/test-infra,cjwagner/test-infra,cblecker/test-infra,cjwagner/test-infra,kubernetes/test-infra,BenTheElder/test-infra,fejta/test-infra,cjwagner/test-infra,pwittrock/test-infra,kubernetes/test-infra,michelle192837/test-infra,pwittrock/test-infra,pwittrock/test-infra,jessfraz/test-infra,dims/test-infra,monopole/test-infra,fejta/test-infra,monopole/test-infra,fejta/test-infra,michelle192837/test-infra,pwittrock/test-infra,cjwagner/test-infra,cblecker/test-infra,brahmaroutu/test-infra,jessfraz/test-infra