Gitlab: Optimize the job dependency list more

Gitlab: Optimize the job dependency list more

In general, we want to fail the whole pipeline as soon as we can if we
spot an error while also letting bigger jobs get started as soon as
possible. Currently we use the "Run binman, buildman, dtoc, Kconfig and
patman testsuites" job from the testsuite stage to unblock the next
stage as this test is complex enough that if it passes, likely the whole
stager will pass. Using this same logic, unblock the world build (and
sjg-lab) stages if "sandbox test.py" has completed as if there's no
failures here, there's likely not failures in the rest of the test.py
stages.

Signed-off-by: Tom Rini <trini@konsulko.com>