Use docker-practice/actions-setup-docker to set up Docker on macOS

[jwodder]

This is an alternative to #55.

[yarikoptic]

it somehow wasn't in effect? I still see /Users/runner/DLTMP ... needs debugging. BTW -- does it replicate on your OSX laptop (trying to ssh into that docker container etc)?

[jwodder]

@yarikoptic I forgot to run make after updating the template for the previous commit. That's fixed now.

[yarikoptic]

now it is red across all CI runs for test-datalad, I guess more work todo

[jwodder]

@yarikoptic Datalad seems to be resolving TMPDIR on the host machine and then using that path inside the Docker container, which leads to failures, as /tmp on macOS is a symlink to /private/tmp, which doesn't exist inside the containers and which Datalad doesn't have permission to create.

[yarikoptic]

re ubuntu fails -- would be worth rerunning, I think the issue with test_expanduser failing was identified/resolved.

re OSX: I guess we should bind mount resolved /tmp (/private/tmp?) as well to resolve it?

[jwodder]

Closing as the action in question does not seem to work properly any more.