Move wg.Add outside of gofunc in setup_e2e_test

[mattcary]

/kind cleanup

Fix waitgroup usage in setup_e2e_test, for govet error discovered in #2178.

Also trying to fix flakes on ssh (I suspect C3s may have more delay from the instance going ready to ssh being available than n2s?)

None

[k8s-ci-robot]

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[hajiler]

/lgtm

[mattcary]

/retest

e2e test is flaking on machine bringup

[hajiler]

/lgtm

[k8s-ci-robot]

@mattcary: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-gcp-compute-persistent-disk-csi-driver-e2e-arm	a931f88	link	false	/test pull-gcp-compute-persistent-disk-csi-driver-e2e-arm
pull-gcp-compute-persistent-disk-csi-driver-e2e-windows-2019	a931f88	link	false	/test pull-gcp-compute-persistent-disk-csi-driver-e2e-windows-2019

Full PR test history. Your PR dashboard. Please help us cut down on flakes by linking to an open issue when you hit one in your PR.

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[hajiler]

/lgtm