ci: Uprev piglit to 99be1b06ff36

Gives us nice diffs in Piglit summaries, for trace tests:

https://tomeu.pages.freedesktop.org/-/mesa/-/jobs/13294404/artifacts/results/summary/results/trace@freedreno-a306@minetest@minetest.trace.html

Brings in these changes:

99be1b06ff36 framework/replay: Display the image differences if any
3074b9c72b3d glsl-predication-on-large-array: Test predication on values from large array
c97da22d35b4 cmake: Fix gbm test compiling
0cbccd68c3c1 piglit: Find our data directory when we're invoked through a symlink
4eb71fc10bbe arb_sso: add test that has explicit locations and array fields in ifc
fa9c82380273 glsl-1.30: test shadow var in a switch
aa7f042b0417 glsl-1.30: add tests for incorrect "compare to 0" optimizations
60138ef32ec1 add explicit tests for GetFragDataLocation/Index(gl_Frag*)
4a8806696b90 egl: add test for EGL_KHR_display_reference
d6b7053b4e52 glsl-1.30: test that switch expression is evaluated once
8023a3c945c3 arb_shader_storage_buffer_object: Require extension on the new test
8820cac60827 pbobench: Fix sometimes-uninitialized warning.

Signed-off-by: Tomeu Vizoso tomeu.vizoso@collabora.com