Move b.gcr.io/k8s_authenticated_test to gcr.io/k8s-authenticated-test

[zmerlynn]

What this PR does / why we need it:

Per https://cloud.google.com/container-registry/docs/support/deprecation-notices, b.gcr.io access will be deprecated soon.

I've already mirrored the repo to the location specified in this PR.

[k8s-reviewable]

This change is 

[k8s-cherrypick-bot]

Removing label cherrypick-candidate because no release milestone was set. This is an invalid state and thus this PR is not being considered for cherry-pick to any release branch. Please add an appropriate release milestone and then re-add the label.

[ixdy]

/lgtm

[k8s-github-robot]

[APPROVALNOTIFIER] Needs approval from an approver in each of these OWNERS Files:

• test/OWNERS [spxtr]

You can indicate your approval by writing /approve in a comment
You can cancel your approval by writing /approve cancel in a comment

[zmerlynn]

@ixdy Can you approve as well, or does it need a separate approver?

[spxtr]

The approval munger should suggest an assignee if they are also an owner.

[spxtr]

/approve

[zmerlynn]

@spxtr: Sorry, are you saying that's the current behavior or the desired behavior?

[spxtr]

Desired behavior. It should've suggested ixdy instead of me.

[k8s-github-robot]

Automatic merge from submit-queue

[zmerlynn]

This will need to be cherrypicked clear back to v1.3, since we're still doing 1.3->1.5 upgrade testing.

[k8s-cherrypick-bot]

Commit found in the "release-1.3" branch appears to be this PR. Removing the "cherrypick-candidate" label. If this is an error find help to get your PR picked.