app/bbdev: update test vectors

app/bbdev: update test vectors

Modification to vectors parameters used for unit test
for coverage and performance test of bbdev drivers
across all devices.
Updating and reducing list for focused coverage on relevant
code blocks for 4G and 5G. Less focus on 4G TB mode as there is
some question how to best support this with mbuf limitations and
if effect are not used.
Removing scenarios with negative LLR assumptions which are not
used with any PMDs and historical only.

Signed-off-by: Nicolas Chautru <nicolas.chautru@intel.com>
Acked-by: Dave Burley <dave.burley@accelercomm.com>
Acked-by: Akhil Goyal <akhil.goyal@nxp.com>