test: Use beiboot on fedora-coreos

[allisonkarlitskaya]

Our current fedora-coreos test setup overlays the bridge and the plugins
on the host and then additionally installs the various RPMs into a
container.  This is more or less what you needed to do in the
pre-beiboot world, but the container on its own has been sufficient for
quite some time.

Let's get rid of the "host" install component and just use the container
straight-up, which is what we expect our users to be doing anyway.

[martinpitt]

Yay!

breaks rhel-8-10

[martinpitt]

My suggestion: in the first run, just make skipOstree do what skipWsContainer does (1-line copy&paste change), run the tests, and we look at the fallout. For the real fix we need to replace most @skipOstree with @skipWsContainer`. If we are lucky, it's "all of them", and we don't even need skipOstree any more?

[allisonkarlitskaya]

My suggestion: in the first run, just make skipOstree do what skipWsContainer does (1-line copy&paste change), run the tests, and we look at the fallout. For the real fix we need to replace most @skipOstree with @skipWsContainer`. If we are lucky, it's "all of them", and we don't even need skipOstree any more?

The two functions are already functionally equivalent because isBeiboot() will always be False here because TEST_SCENARIO doesn't contain ws-container. I modified skipBeiboot() instead to also check ostree images. Let's see how far that gets us.