Fix docker-clean target, accounting for slashes

[AlanCoding]

SUMMARY

As documented in moby/moby#36196, the docker reference= notion does not support /. This is a problem, as it makes the prior filter completely non-functional:

docker images --filter=reference='*awx_devel*' -aq

This returns no images because * does not match ghcr.io/ansible, as per the file glob philosophy - and requests for an expansion pattern ** that include slashes (as per file globs) have been denied.

Multiple --filter arguments will OR the criteria together, so we are safe to allow fewer slashes by being slightly redundant, as I am doing here. This is essentially a poor person's version of **.

ISSUE TYPE

• Bug, Docs Fix or other nominal change

COMPONENT NAME

• API

ADDITIONAL INFORMATION

Because web/task split just merged, it goes without saying that many people will need an image refresh.