https://github.com/gem5/gem5/actions/runs/6114221855 failure was due
to to running the actions inside our 22.04-all-dependencies container.
This container does not contain docker. We must therefore run this action
outside of the container. However, due to our policy of checking out the
code within this container, we must split this into two jobs and use the
artifact upload and download to get the resources we want.
Change-Id: I6a5f9c3a4c287a56a3d5abe3b84dd560fa2e9ff1
75a33ec377