Update integrated gates template for grenade skip level job

Current master is a non SLURP release so we do not need to run
greande-skip-level job as default though any project want to run
skip level testing they can use the greande-skip-level-always job
for example nova doing.

With branch variant, we make run no change in integrated gate jobs
for stable/2023.1 testing.

Change-Id: I183fe7513064d46255e8b078528d7e3639a3ce1a
1 file changed