Fix: Check the value of NoOutputBeforeRecoveryFlag prior to marking no output
requested to merge hendry197/VVCSoftware_VTM:CheckingNoOutputBeforeRecoveryPicFlagBeforeNotOutputtingDPBPic into master
This MR provide added a check to ensure that decoder will take action whether or not to mark existing pictures in the DPB as no needed for output only if the current picture is a CVSS or CVLSS (i.e., the current picture is an IRAP / GDR with NoOutputBeforeRecoveryFlag equal to 1)