Store latest DRAP POC in DecLib and set it to Slice

Nikolay Shostakrequested to merge
nikolay.shostak/VVCSoftware_VTM:fix-drap-checks into master

Currently for pictures which follow DRAP m_latestDRAPPOC is always MAX_INT.

This prevents checkConformanceForDRAP() from checking ref pic constraints.

Merge request reports