ci: Always save the artifacts for performance traces

We need the job artifacts in all cases to gather performance data.
Since commit b723bc80d2, we were only saving them on failures.

Fixes: b723bc80d2 ("ci/lava: inherit .piglit-traces-test in .lava-piglit-traces and deduplicate configs")

Signed-off-by: Valentine Burley <valentine.burley@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/36195>

.gitlab-ci/test-source-dep.yml

@@ -129,6 +129,16 @@
   # Don't run in parallel. It is okay to performance jobs to take a little
   # longer to finish, as they don't block marge from merging an MR.
   parallel: null
+  artifacts:
+    name: "${CI_PROJECT_NAME}_${CI_JOB_NAME_SLUG}"
+    when: always
+    paths:
+    - results/
+    exclude:
+    - results/*.shader_cache
+    reports:
+      junit:
+      - results/junit.xml
 
 # Mesa source file dependencies that may impact any GL driver test job.
 .gallium-core-rules: