add support for qemu to denylist processing

[dustymabe]

Basically if I add an entry to kola-denylist.yaml that looks like:

- pattern: podman.base                                                                                                            
  tracker: https://github.com/coreos/fedora-coreos-tracker/issues/966                                                                        
  snooze: 2021-10-15                                                                                                                         
  platforms:                                                                                                                                 
    - aws                                                                                                                                    
    - gcp                                                                                                                                    
    - qemu

It would be nice if it worked against qemu. Right now you have to use qemu-unpriv.

[dustymabe]

@HuijingHei - is this one solved now with your recent work?

[HuijingHei]

Probably no, could you help to add more description about this?

[HuijingHei]

What I can understand about qemu vs qemu-unpriv is refer to https://github.com/coreos/coreos-assembler/tree/main/mantle#qemu

[HuijingHei]

In case it meant Replace 'qemu-unpriv' with 'qemu', seems #3285 is doing this. But it might be old, I will open another PR for this.

[dustymabe]

@HuijingHei - I'm so sorry. I totally confused this qemu/qemu-unpriv work with the recent work you did for gcp/gce in #3378.

It was @travier doing the qemu bits (as you found).

[HuijingHei]

@dustymabe No problem.