Run usr/fileio/fileio_tgt over scst_local with an LD_PRELOAD hook that
replaces the block length of one READ CAPACITY(10) or (16) reply with
809052976, as a user space backend did in production. The invalid reply
must be rejected with INTERNAL TARGET FAILURE sense, and afterwards READ
CAPACITY(10) and (16), reads and writes must return the right geometry
and data.
The local suite now builds usr and loads scst_user, and the CI image
builds usr for the Ginkgo guest.