[FreeBSD] Fix crash when running podman inspect

[bcooksley]

When preparing container inspection output, ensure we actually have masked paths to work with.
These will only be available on Linux, which is no longer always true as we also support FreeBSD now.

Fixes #21117

Does this PR introduce a user-facing change?

None

[bcooksley]

@lsm5 Not entirely sure how to proceed here given there is no reviewer listed in the comment from the bot above.

On the unit testing front, given there is no FreeBSD CI not sure how to best unit test this as it would require setting up quite a bit of scaffolding to force c.config.Spec.Linux to be false on a Linux system - if that is even possible (and is something that probably requires more knowledge of the codebase than I possess i'm afraid)

[dfr]

@lsm5 Not entirely sure how to proceed here given there is no reviewer listed in the comment from the bot above.

On the unit testing front, given there is no FreeBSD CI not sure how to best unit test this as it would require setting up quite a bit of scaffolding to force c.config.Spec.Linux to be false on a Linux system - if that is even possible (and is something that probably requires more knowledge of the codebase than I possess i'm afraid)

You can add '[NO NEW TESTS NEEDED]' to the commit message which will fix the validation failures. FreeBSD CI is limited to making sure it builds at the moment.

[bcooksley]

Thanks, have done so now.

[edsantiago]

LGTM. Thanks @bcooksley

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: bcooksley, edsantiago

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[rhatdan]

/lgtm
Thanks @bcooksley