Fix condition on kata_containers_version/kube_version check when kata_containers_enabled is false

[emiran-orange]

What type of PR is this?
/kind bug

What this PR does / why we need it:
The check on the compatibility between kata_containers_version and kube_version was performed even if kata containers weren't enabled.
This PR adds a condition to the check task on kata_containers_enabled.

On the way, a small typo has been fixed.

Which issue(s) this PR fixes:
None that I know of

Special notes for your reviewer:
N/A

Does this PR introduce a user-facing change?:

Fix condition on kata_containers_version/kube_version check when kata_containers_enabled is false

[k8s-ci-robot]

Hi @emiran-orange. Thanks for your PR.

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[cristicalin]

Thanks @emiran-orange !

/ok-to-test
/lgtm

[oomichi]

Nice catch.

/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: emiran-orange, oomichi

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