Restore tests for docker runtime

[afbjorklund]

What would you like to be added:

Need to run tests for docker, similar to cri-o.

Why is this needed:

The tests were removed because of "dockershim":

• vendor: bump kube to 1.26 #1040

But no tests were added for the actual "cri-dockerd".

---

Note: It wasn't actually using dockershim for 1.24 and 1.25 either, since it had been removed from the codebase.

It just renamed the remote socket endpoint, instead of removing dockershim from cri-tools (as per Issue #870).

commit 175fbd1

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[afbjorklund]

Not supported, needs to be tested downstream (in cri-dockerd).