ci: Add a disabled-by-default job for GLES3 testing on db410c.

Now that we have 7 (soon 8) boards available, there's capacity to be
testing GLES 3.0.  However, due to (it looks like) buffer overflows in the
driver, we end up with flaky test results: 1/60 jobs spuriously failed,
and another 6/60 jobs reported flakes.  At 6 jobs per pipeline, that's way
too high of a failure rate to enable for non-freedreno developers.  Leave
the job present but disabled so that we can do manual test runs for
regressions.

Reviewed-by: Daniel Stone <daniels@collabora.com>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/3661>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/3661>

.gitlab-ci/deqp-freedreno-a307-skips.txt

@@ -8,3 +8,16 @@ dEQP-GLES[0-9]*.stress.*
 
 # These are really slow on tiling architectures (including llvmpipe).
 dEQP-GLES[0-9]*.functional.flush_finish.*
+
+# Flaky results
+dEQP-GLES3.functional.occlusion_query.stencil_write
+dEQP-GLES3.functional.rasterization.fbo.rbo_.*
+dEQP-GLES3.functional.rasterization.fbo.texture_2d.interpolation.triangles
+dEQP-GLES3.functional.rasterization.fbo.texture_2d.primitives.points
+dEQP-GLES3.functional.rasterization.flatshading.lines_wide
+dEQP-GLES3.functional.rasterization.flatshading.triangles
+dEQP-GLES3.functional.shaders.linkage.varying.interpolation.centroid
+dEQP-GLES3.functional.shaders.texture_functions.texturegradoffset.*
+dEQP-GLES3.functional.shaders.texture_functions.textureprojgradoffset.*
+dEQP-GLES3.functional.texture.units.4_units.only_3d.*
+dEQP-GLES3.functional.vertex_arrays.single_attribute.*

.gitlab-ci/lava-gitlab-ci.yml

@@ -150,3 +150,9 @@ freedreno-a307-gles2:
     BOOT_METHOD: fastboot
   tags:
     - lava-mesa-db410c
+
+.freedreno-a307-gles3:
+  parallel: 6
+  extends: freedreno-a307-gles2
+  variables:
+    DEQP_VERSION: gles3