kubernetes_e2e.py: don't exclude provider 'local' from gce_ssh

[neolit123]

the latest runs of k-a jobs are failing with:

Something went wrong: failed to prepare test environment: stat /workspace/.ssh/google_compute_engine: no such file or directory

https://gubernator.k8s.io/build/kubernetes-jenkins/logs/ci-kubernetes-e2e-kubeadm-gce-master/584

add a solution in kubernetest_e2e.py as suggested by @krzyzacy on slack:

would say for the actual local provider job, we won't mount the gce ssh key, so we are fine there.

/assign @krzyzacy @BenTheElder
/kind failing-test
/area kubetest

[krzyzacy]

/lgtm
/this-is-fine

[k8s-ci-robot]

@krzyzacy:

In response to this:

/lgtm
/this-is-fine

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[k8s-ci-robot]

LGTM label has been added.

Git tree hash: 38282751fe6a2a00c5b44c8c33b56380cb118a72

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: krzyzacy, neolit123

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[neolit123]

for xref:
kubernetes/kubernetes#70139
kubernetes/kubernetes#70058

FYI @timothysc we had to make another change, hopefully this time things go 🍏