ci-tron: avoid uploading downloaded traces

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/36854>

.gitlab-ci/ci-tron/gitlab-ci.yml

@@ -15,6 +15,7 @@
 
     DEQP_RUNNER_SHADER_CACHE_DIR: /cache
     VKD3D_SHADER_CACHE_PATH: /cache
+    PIGLIT_CACHE_DIR: /cache
 
     CI_TRON__B2C_ARTIFACT_EXCLUSION: "install/*"
     CI_TRON_HTTP_ARTIFACT__INSTALL__PATH: "/install.tar.zst"

.gitlab-ci/test/gitlab-ci-inc.yml

@@ -137,7 +137,8 @@
   extends:
     - .test-piglit
   variables:
-    PIGLIT_REPLAY_EXTRA_ARGS: --db-path ${CI_PROJECT_DIR}/replayer-db/ --minio_bucket=${S3_TRACIE_PUBLIC_BUCKET} --jwt-file=${S3_JWT_FILE}
+    PIGLIT_CACHE_DIR: $CI_PROJECT_DIR
+    PIGLIT_REPLAY_EXTRA_ARGS: --db-path ${PIGLIT_CACHE_DIR}/replayer-db/ --minio_bucket=${S3_TRACIE_PUBLIC_BUCKET} --jwt-file=${S3_JWT_FILE}
     PIGLIT_REPLAY_DEVICE_NAME: $GPU_VERSION
     PIGLIT_RESULTS: "${GPU_VERSION}-replay"
     PIGLIT_NO_WINDOW: 1