CA-128373: move lvm.conf patch from dom0.hg to sm

Patch in dom0.hg/patches.dom0/patch-etc_lvm_lvm.conf takes care of
CA-16427 and CA-57153. Because of CP-5830, we end up with inconsistent
lvm.conf files. We drop the patch from dom0.hg and now configure
lvm.conf during SM RPM installation time, the same way we do for CP-5830.

NB the way we configure lvm.conf is very fragile, we should use
Germano's Python script for Borehamwood (it lives in
tampa-lcm/sm.hg/mk/sm.spec.in).

Signed-off-by: Thanos Makatos <thanos.makatos@citrix.com>