freedreno/ci: Re-enable Adreno 660 for Vulkan pre-merge jobs
What does this MR do and why?
Adreno 660 is stable enough now to be re-enabled for pre-merge Vulkan jobs.
We've also got GPU hang detection now so that the job can restart if a GPU fault occurs, but so far I've only seen that happen in full jobs, not the pre-merge ones in my stress tests.
Also update the expectations since a lot of tests had been previously fixed, but that was missed due to fractional runs.