panvk/ci: Increase panfrost-g52-vk fraction
What does this MR do and why?
panvk/ci: Increase panfrost-g52-vk fraction
premerge have a time limit of 15 min, those jobs takes between 20 to 33
min with a fraction of 8 right now.
Additionally, we only have 7 VIM3 and could be trying to queue 8 jobs.
Let's fraction to 32 for now and revert back to 2 runners.
Signed-off-by: Mary Guillemard <mary.guillemard@collabora.com>
Fixes: 2f54228da538 ("panvk/ci: Update to run full CTS on G52")