gitlab-ci: Enable unit test reports for normal runner traces jobs

Inform gitlab about the JUnit XML file that tracie produces, 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>
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index ebd9f25..57fb5bb 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1344,6 +1344,9 @@
       - traces-db/
   variables:
     TRACIE_UPLOAD_TO_MINIO: 1
+  artifacts:
+    reports:
+      junit: results/junit.xml
 
 .traces-test-gl:
   extends: