ci/vc4: Merge quick_shader in with deqp-gles

All 4 jobs had a total of about 26 minutes of runner time, so squish them
onto 3 runners and use gbm for the .shader_tests to avoid X overhead and
hopefully succeed with full concurrency.

Reviewed-by: Juan A. Suarez <jasuarez@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17172>

src/broadcom/ci/deqp-broadcom-rpi3.toml

@@ -23,3 +23,11 @@ deqp_args = [
     "--deqp-surface-width=256",
     "--deqp-visibility=hidden",
 ]
+
+
+[[piglit]]
+piglit_folder = "/piglit"
+profile = "quick_shader"
+process_isolation = true
+  [piglit.env]
+  PIGLIT_PLATFORM = "gbm"

src/broadcom/ci/gitlab-ci.yml

@@ -17,10 +17,10 @@
   tags:
     - igalia-rpi3
 
-vc4-rpi3-gles:armhf:
+vc4-rpi3:armhf:
   extends:
     - .vc4-rpi3-test:armhf
-  parallel: 2
+  parallel: 3
   variables:
     HWCI_TEST_SCRIPT: "/install/deqp-runner.sh"
     DEQP_SUITE: broadcom-rpi3
@@ -51,14 +51,6 @@ vc4-rpi3-piglit-quick_gl:armhf:
     FDO_CI_CONCURRENT: 1
     PIGLIT_PROFILES: quick_gl
 
-vc4-rpi3-piglit-quick_shader:armhf:
-  extends:
-    - .vc4-rpi3-piglit:armhf
-  parallel: 2
-  variables:
-    FDO_CI_CONCURRENT: 2
-    PIGLIT_PROFILES: quick_shader
-
 .v3d-rpi4-test:armhf:
   extends:
     - .baremetal-test-armhf