make-fligh: Fix freebsd guest test test-id

make-fligh: Fix freebsd guest test test-id

Current freebsd as guest tests rely on the variable $qemuu_suffix, but
that one may or may not be set yet, and can't be rely upon. It isn't
set on the first iteration which call test_matrix_do_one(), with
xenarch=amd64 dom0arch=i386, but it is on the second call with
xenarch=amd64 dom0arch=amd64.

Only flights on branch linux-linus and linux-6.1 are changes (and the
disabled linux-next branch). This is because the first call of
test_matrix_do_one() is with dom0arch=amd64 as we skip "i386". On
those branches, we have this changes in jobs names:

-test-amd64-amd64-freebsd11-amd64
-test-amd64-amd64-freebsd12-amd64
+test-amd64-amd64-qemuu-freebsd11-amd64
+test-amd64-amd64-qemuu-freebsd12-amd64

This patch will have the benefit to avoid the opposite changes in all the other
branches as we are going to make some changes to job generation.

Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Acked-by: Roger Pau Monné <roger.pau@citrix.com>