Make a matrix testing one host provider on many rancher/k3s versions

[thehejik]

This would fit our validating process when the given providers are divided between QA.

So for example by giving something like latest/devel/[email protected]+k3s1;latest/devel/[email protected]+k3s1;... we would test on two+ different ranchers versions in parallel on separate runners.

We would still keep testing specific tests like p0_provisioning but on all versions at once (within one run).

NOTE: This might be problematic in sense of using different release branches of our e2e tests.