KVM: arm64: Drop Columbia-hosted mailing list

After many years of awesome service, the kvmarm mailing list hosted by
Columbia is being decommissioned, and replaced by kvmarm@lists.linux.dev.

Many thanks to Columbia for having hosted us for so long, and to the
kernel.org folks for giving us a new home.

Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20230113132809.1979119-1-maz@kernel.org


Signed-off-by: Oliver Upton <oliver.upton@linux.dev>