Merge branch 'cherry-pick-fc937afb [formerly e1b6ac0cd0]-21.0' into '21.0'

Sweeping !14453 from 21.1 to 21.0.
Tau triggers: fix HLT tau-vertex element link

See merge request atlas/athena!14536

Former-commit-id: f661cd61016036e637089283ca038dea72c87d1e

Trigger/TrigAlgorithms/TrigTauRec/src/TrigTauRecMerged.cxx

@@ -1045,6 +1045,9 @@ HLT::ErrorCode TrigTauRecMerged::hltExecute(const HLT::TriggerElement* inputTE,
 	static SG::AuxElement::Accessor< xAOD::TauJet::JetLink_t > jetAcc( "jetLink" );
 	jetAcc( *p_tau ).toPersistent();
 
+	static SG::AuxElement::Accessor< xAOD::TauJet::VertexLink_t > vertexAcc( "vertexLink" );
+	vertexAcc( *p_tau ).toPersistent();
+
 	xAOD::TauJet::TauTrackLinks_t new_tauTrackLinks;
 	static SG::AuxElement::Accessor< xAOD::TauJet::TauTrackLinks_t > tauTrackAcc( "tauTrackLinks" );
 	static SG::AuxElement::Accessor< xAOD::TauTrack::TrackParticleLinks_t > trackAcc( "trackLinks" );