bisect.jpl: add stage to check passing boot
bisect.jpl: add stage to check passing boot

Add "Check pass" stage to build and boot test the git revision given
as "good".  This is to reduce the chances of false positives.

Also move the git bisection start command to a separate "Start" stage.

Signed-off-by: Guillaume Tucker <e7e20b7c30f19d4ca6b81319ef81bf200369d137@collabora.com>

kernelci/lava-ci-staging,kernelci/lava-ci-staging,kernelci/lava-ci-staging