ACTS CI: Enable longer FPE stack trace

Enable longer FPE stack trace in ACTS CI tests.

/cc @cvarni @pagessin

AtlasTest/CITest/test/ActsBenchmarkWithSpot.sh

@@ -5,6 +5,7 @@ input_rdo=/cvmfs/atlas-nightlies.cern.ch/repo/data/data-art/InDetPhysValMonitori
 n_events=10
 
 Reco_tf.py --CA \
+  --preExec "flags.Exec.FPE=500;" \
   --preInclude "InDetConfig.ConfigurationHelpers.OnlyTrackingPreInclude,ActsConfig.ActsCIFlags.actsBenchmarkSpotFlags" \
   --postExec "cfg.getEventAlgo(\"ActsTrkITkPixelClusterizationAlg\").PixelClustersKey=\"xAODpixelClusters\";cfg.getEventAlgo(\"ActsTrkITkStripClusterizationAlg\").StripClustersKey=\"xAODstripClusters\";" \
   --inputRDOFile ${input_rdo} \