LU-7699 build: Eliminate lustre_build_version.h

LU-7699 build: Eliminate lustre_build_version.h

The lustre_build_version.h is no longer necessary.  With the new
versioning system the lustre version can now be retrieved from
standard autotools defines and/or lustre_ver.h.

To make compatibility easier for the upstream lustre client in
the linux kernel, we use LUSTRE_VERSION_STRING from lustre_ver.h.

Change-Id: I08233d8547bc4af7bf2fb0c15bee8e306f6fa0f0
Signed-off-by: Christopher J. Morrone <morrone2@llnl.gov>
Reviewed-on: http://review.whamcloud.com/18108
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: James Simmons <uja.ornl@yahoo.com>
Reviewed-by: Dmitry Eremin <dmitry.eremin@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>