test: don't run kubelet restart test if ssh is blocked

[jackfrancis]

Reason for Change:

This PR updates the E2E test runner so that the "validate kubelet comes back up after restart" test doesn't run if SSH access is blocked.

Issue Fixed:

Requirements:

• uses conventional commit messages
• includes documentation
• adds unit tests
• tested upgrade from previous version

Notes:

[acs-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: jackfrancis

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• OWNERS [jackfrancis]

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[codecov]

Codecov Report

Merging #3638 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #3638   +/-   ##
=======================================
  Coverage   73.14%   73.14%           
=======================================
  Files         147      147           
  Lines       25165    25165           
=======================================
  Hits        18408    18408           
  Misses       5623     5623           
  Partials     1134     1134           

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