Using suites makes load-balancing our jobs much easier, keeps the CPU busy
handling the a630_gles_others.sh test sets (and improves the output and
baseline handling for them), and makes it trivial to add in more short
test sets.
a306: still 5 jobs, and we add KHR-GLES2 (KHR-GLES3 is unstable)
a530: still 5 jobs, added KHR-GLES*
a630_gl: 5 jobs becomes 4, and we add KHR-GLES*
a630_vk: still 3 jobs, now 1/3 of all VK instead of 1/4.
a630_vk_full: still 2 jobs, now includes full bypass testing, partial
no-force testing, and testing of pre-merge-skipped tests.
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12256>
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