[cern] Add ignition_version label
FCOS 34 enables cgroupsv2 by default and comes with an updated ingition that supports kernelArguments. https://github.com/coreos/fedora-coreos-docs/blob/main/modules/ROOT/pages/kernel-args.adoc
Added in igntion 2.10.x https://github.com/coreos/ignition/releases/tag/v2.10.1
Add a label to set the igntion payload version.
- 3.3.0-experimental for FCOS34
- 3.0.0 for FCOS31
- We will see a warning with ignition ignoring the kernelArguments section.
Change-Id: I49257389ca19bf40de9231cc98e3503b8c9bd7ea Signed-off-by: Spyros Trigazis spyridon.trigazis@cern.ch