- don't access SPS/PPS references which are not set
- also fixes config files

Fix: Add GDR NUT to CLVSS PU

See merge request jvet/VVCSoftware_VTM!1356

JVET-Q0449: Disable smoothing half-sample interpolation filter in conjunction with RPR

See merge request jvet/VVCSoftware_VTM!1353

Software manual updates

See merge request jvet/VVCSoftware_VTM!1319

Fix issue with min_qp_prime_ts_minus4 signalling in !1328

See merge request jvet/VVCSoftware_VTM!1349

Fix for Ticket #869 - Duplicated LoopFilterTcOffset_div2 setting in configuration files

See merge request jvet/VVCSoftware_VTM!1351

JVET-Q0493: Palette encoder improvements for lossless coding

See merge request jvet/VVCSoftware_VTM!1342

Detail
- Use correct precision of distortion based on input bit-depth during the derivation of the palette for lossless coding.
- Remove the unnecessary calculation of distortion during palette coding RD decision on lossless.

Implement SPS IDs within CLVS constraint check

See merge request jvet/VVCSoftware_VTM!1347

JVET-Q0114: AHG9: A few more general constraints flags

See merge request jvet/VVCSoftware_VTM!1282

fix parcat for JVET-Q0781

See merge request jvet/VVCSoftware_VTM!1345

JVET-Q0629: Removal of 4x4 blocks in palette mode

See merge request jvet/VVCSoftware_VTM!1327

JVET-Q2014: additional cfg files for lossless ctc

See merge request jvet/VVCSoftware_VTM!1340

JVET-Q0814: Decoded Picture Buffer

See merge request jvet/VVCSoftware_VTM!1289

Fix for decoding issue in chroma format 400

See merge request jvet/VVCSoftware_VTM!1339

Detail
- Disable palette mode for 4x4 blocks.

Fix #856: chroma BDPCM for monochrome

See merge request jvet/VVCSoftware_VTM!1325

Disable JVET_O1143_SUBPIC_BOUNDARY because of decoder seg fault

See merge request jvet/VVCSoftware_VTM!1331

Fix #864: Set deblocking_filter_override_enabled_flag to 0 when not present

See merge request jvet/VVCSoftware_VTM!1332