feat(pmf): capture timestamps in bl stages

Added test_group to test bl-marker.
ci script will fail if pmf timecaptures are not present, in
the uart 0 log.

Signed-off-by: Thaddeus Serna <Thaddeus.Gonzalez-Serna@arm.com>
Change-Id: I7e7d2dcb119f1c209f871af34644f7745351ec9e
6 files changed