container: Add pts benchmark suite

Phoronix Test Suite is an open source test suite that incorporates a
number of system-level workloads. Let's wrap it into fastpath in a
similar way to how we wrapped mmtests. There is a single container image
which can figure out what test to run from the meta data that fastpath
passes in, then it parses the pts output to assemble the results in the
fastpath format.

Add an initial set of benchmark yaml fragments for various database and
language runtimes. More benchmark integrations will follow.

Signed-off-by: Ryan Roberts <ryan.roberts@arm.com>