Improve the check for Node bootstrap issue

[dimitar-kostadinov]

How to categorize this PR?

/area testing
/kind flake

What this PR does / why we need it:
Improving the check for Node bootstrap issue. Now containerd logs are checked for I/O timeout errors during image pull.

Which issue(s) this PR fixes:
Fixes #290

Special notes for your reviewer:
Depends on gardener/gardener#11010 and/or gardener/gardener#11008

Release note:

NONE

[gardener-prow]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[gardener-prow]

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/lifecycle stale

[dimitar-kostadinov]

/remove-lifecycle stale