[release-1.10] chore: fix go vet errors around conditions.MarkFalse

[k8s-infra-cherrypick-robot]

This is an automated cherry-pick of #1517

/assign salasberryfin

chore: fix go vet errors around conditions.MarkFalse

[k8s-ci-robot]

@k8s-infra-cherrypick-robot: The following test 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-cluster-api-provider-gcp-apidiff-release-1-10	30c0669	link	false	/test pull-cluster-api-provider-gcp-apidiff-release-1-10

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[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: cpanato, k8s-infra-cherrypick-robot

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