Collect all logs for e2e tests

[juadk]

When a test fail, all the logs should be collected and uploaded at the end of the test... it will save hours of debugging like it happened in this issue https://github.com/rancher/elemental/issues/410....

From the elemental node: elemental-support system-upgrade-controller

From the Rancher node (where Rancher manager is installed): rancher pod logs Maybe there is a command to generate all logs from rancher.

[kkaempf]

This issue should get a corresponding one on the elemental-operator repo, where elemental-support lives.

[juadk]

There is a script to collect all rancher logs: https://www.suse.com/support/kb/doc/?id=000020191