This is a basic implementation of a detection method for whether mgmt is
running in a virtualized environment. We achieve this by doing two types
of checks: on one hand, we check if the CPU flags can confirm the
presence of a virtualized env; on the other, we check if the presence
of known files related with DMI (and their contents) can confirm whether
we're inside a virt env. Either of these situations will cause the
function to return true, with the default case being false. All of these
checks are relatively naive and can be improved by looking at the main
inspiration for this implementation, which was systemd's own check for
the presence of virtualization.
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