ATLASRECTS-5057: Avoid holes search in GSF

This MR is intended to save some CPU time during GSF. The holes search is a bit time consuming and we can estimated by hand looking at the number of holes in the original track and change in the number of silicon hits between the original track and the GSF tracks.

Mentioning @christos and @amorley

InnerDetector/InDetRecTools/InDetTrackSummaryHelperTool/src/InDetTrackSummaryHelperTool.cxx

@@ -76,7 +76,7 @@ StatusCode InDet::InDetTrackSummaryHelperTool::initialize()
     if (not m_pixeldedxtool.empty()) ATH_MSG_INFO("Retrieved tool " << m_pixeldedxtool);
   }
 
-  if ( m_holeSearchTool.retrieve().isFailure() ) {
+  if ( not m_holeSearchTool.empty() && m_holeSearchTool.retrieve().isFailure() ) {
     ATH_MSG_FATAL("Failed to retrieve tool " << m_holeSearchTool);
     return StatusCode::FAILURE;
   } else {