gitlab-ci: Enable unit test reports for lava traces jobs

Download from minio the JUnit XML file that tracie produces and inform
gitlab about it, so that the pipeline page can present more detailed
information about tracie test results.

Signed-off-by: Alexandros Frantzis <alexandros.frantzis@collabora.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6598>

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

@@ -131,23 +131,34 @@ kernel+rootfs_armhf:
     - kernel+rootfs_amd64
     - meson-testing
 
+.lava-traces-base:
+  after_script:
+    - mkdir -p artifacts
+    - wget -O "artifacts/junit.xml" "https://minio-packet.freedesktop.org/artifacts/${CI_PROJECT_PATH}/${CI_PIPELINE_ID}/${CI_JOB_ID}/traces/junit.xml"
+  artifacts:
+    reports:
+      junit: artifacts/junit.xml
+
 .lava-traces:amd64:
   variables:
     TEST_SUITE: "tracie"
   extends:
     - .lava-test:amd64
+    - .lava-traces-base
 
 .lava-traces:armhf:
   variables:
     TEST_SUITE: "tracie"
   extends:
     - .lava-test:armhf
+    - .lava-traces-base
 
 .lava-traces:arm64:
   variables:
     TEST_SUITE: "tracie"
   extends:
     - .lava-test:arm64
+    - .lava-traces-base
 
 panfrost-t720-gles2:arm64:
   extends: