ci/trace: Move trace cleanup to Piglit runner

No sense in polluting our common init code with this.

Signed-off-by: Daniel Stone <daniels@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/31110>

.gitlab-ci/common/init-stage2.sh

@@ -208,8 +208,6 @@ set -e
 # Let's make sure the results are always stored in current working directory
 mv -f ${RESULTS_DIR} ./ 2>/dev/null || true
 
-[ ${EXIT_CODE} -ne 0 ] || rm -rf results/trace/"$PIGLIT_REPLAY_DEVICE_NAME"
-
 # Make sure that capture-devcoredump is done before we start trying to tar up
 # artifacts -- if it's writing while tar is reading, tar will throw an error and
 # kill the job.

.gitlab-ci/piglit/piglit-traces.sh

@@ -219,6 +219,7 @@ fi
 
 
 if [ ! -s $RESULTSFILE ]; then
+    rm -rf "${RESULTS_DIR:?}/${__PREFIX}"
     exit 0
 fi