ci/freedreno: Turn off default a530 quick_gl testing, do full quick_shader.
The quick_gl set is too unstable -- even when I switched to a consistent set of tests, and added lots of flakes, I keep getting new ones as some test (unclear which, but it's like 7-8 minutes into the run) kills other innocent ones. Until we get per process pagetables, disable this testing by default.
However, now that we've freed up a board that was doing quick_gl, we have time to do all of quick_shader so that piglit uprevs don't reshuffle the test list and expose new failures.