Docker with the containerd image store (the default since Docker v29 on
fresh installs, e.g., on the ubuntu-26.04 GitHub Actions runners) refuses
to resolve a reference that is both a tag and an image ID prefix
("ambiguous reference"), while nerdctl and Docker with the classic graph
drivers resolve the tag first.

Introduce a nerdtest.DockerContainerdSnapshotter requirement that detects
the containerd image store from the "driver-type" entry of
`docker info`'s DriverStatus, and skip TestIssue3016 with
require.Not(nerdtest.DockerContainerdSnapshotter).

Assisted-by: Claude Fable 5 <noreply@anthropic.com>
Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>