Due to the slow startup time of deqp-vk, the previous default of
500 tests per group caused the jobs to run up to twice as slowly
compared to using a higher number of tests per group.
Increase the number of tests per group for all subsets of the
deqp-runner suites, which allows decreasing the fractions.
Signed-off-by: Valentine Burley <valentine.burley@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/32681>
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