ITS: GPU: use mean vertex constraint for gpu processing

I noticed that in the Pb-Pb production we did not add the mean vertex constraint to be used.

Author: f3sch

prodtests/full-system-test/dpl-workflow.sh

@@ -572,6 +572,9 @@ if [[ $CTFINPUT == 0 && $DIGITINPUT == 0 ]]; then
 fi
 
 has_detector_gpu ITS && GPU_INPUT+=",its-clusters"
+if [[ $BEAMTYPE != "cosmic" && $SYNCMODE != 1 ]]; then
+  has_detector_gpu ITS && GPU_INPUT+=",its-mean-vertex"
+fi
 has_detector_gpu ITS && GPU_OUTPUT+=",its-tracks"
 
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