Add rootless support

[vvoland]

• needs: docker/install: Support rootless actions-toolkit#485

Wire up rootless config to the new rootless Install option.

[crazy-max]

@vvoland #125 has been merged

[crazy-max]

Pushed extra commit with a rootless job for ci and seems it fails: https://github.com/crazy-max/ghaction-setup-docker/actions/runs/11740833994/job/32708245277#step:3:45

[vvoland]

Oh, I see. I forgot that rootlesskit is also in the rootless-extras. Wondering how did the integration test in actions-toolkit pass though? 🤔

EDIT: Oh, actually the downloaded binaries were added to PATH and it persisted over the multiple test cases, so it had the rootlesskit from the previous image install!

Fixing that up in: docker/actions-toolkit#486

[crazy-max]

#126 has been merged if you want to rebase