Update k8s-cloud-builder to go 1.20.11

[saschagrunert]

What type of PR is this?

/kind cleanup

What this PR does / why we need it:

Update the cloud-builder images to use go 1.20.11 as well.

Which issue(s) this PR fixes:

Follow-up on #3356 #3348

Special notes for your reviewer:

None

Does this PR introduce a user-facing change?

None

[xmudrii]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: saschagrunert, xmudrii

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[k8s-ci-robot]

@saschagrunert: 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-release-image-k8s-cloud-builder	a79b784	link	true	/test pull-release-image-k8s-cloud-builder

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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[saschagrunert]

Closing in favor of #3358