Fix restoring of privileged containers

[adrianreber]

Checkpointed containers started with --privileged fail during restore with:

Error: error creating container storage: ProcessLabel and Mountlabel must either not be specified or both specified

This commit fixes it by not setting the labels when restoring a privileged container.

Fixes #10615

[mheon]

@rhatdan PTAL

[rhatdan]

I am not sure if this is the correct. What does the content end up being labeled?

[adrianreber]

Starting a new container with --privileged in my Fedora 34 gives me:

• process label: unconfined_u:system_r:spc_t:s0
• mount label: system_u:object_r:container_file_t:s0:c1022,c1023

After restore the container has the same labels and starting another container from scratch also gives me the same labels. So new and restored containers have the same labels using --privileged on my system with this change.

[rhatdan]

LGTM

[giuseppe]

/lgtm
/hold

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

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[TomSweeneyRedHat]

LGTM
/hold cancel