fix: [Tagging] Tagging an element with multiple tag collection works as expected.
fix: [Tagging] Tagging an element with multiple tag collection works as
expected.

Previously, it would only add the latest tag collection

FIRSTdotorg/MISP,SteveClement/MISP,MISP/MISP,FloatingGhost/MISP,FIRSTdotorg/MISP,FIRSTdotorg/MISP,SteveClement/MISP,MISP/MISP,MISP/MISP,FIRSTdotorg/MISP,MISP/MISP,SteveClement/MISP,SteveClement/MISP,SteveClement/MISP,FloatingGhost/MISP,MISP/MISP,FloatingGhost/MISP,FloatingGhost/MISP