- Fix overlap in context between the bi-pred flag for 8x8 CUs and the L0/L1 flag for all size CUs.

Move chroma qp offset from PPS extension to PPS

 Added back sps_temporal_mvp_enabled_flag to align with specification text in JVET-O2001-vE. \n This also means that sps_sbtmvp_enabled_flag can be signaled in SPS as before instead of in PPS.

This reverts commit 8e16ada0.

Use vectors and resize them if needed instead of deleting and
reallocating memory for every picture. This appears to have a
significant impact on decoder run time.

Use PLTRunMode type where appropriate instead of bool since
using vector<bool> creates a number of issues

Remove partitioner factory to simplify memory allocation for the
partitioner (use stack instead of heap)

- The 16x16 coeff. zero-out for DST-7/DCT-8 is made disabled in VTM when MTS is turned off according to the suggested fix in #447.
- This fix does not change CTC results.

fix CHECK on cu mode, considering palette mode

fix compilation errors by code merging and harmonize with JVET_O0119_BASE_PALETTE_444, JVET_O0502_ISP_CLEANUP, JVET_O0472_LFNST_SIGNALLING_LAST_SCAN_POS, JVET_O0545_MAX_TB_SIGNALLING

- only cu_qp_delta is conditioned by (CbWidth > 64 || CbHeight > 64)
- move parsing of tu_joint_cbcr_residual_flag[] between cu_chroma_qp_offset_idx and transform_skip_flag instead of before cu_qp_delta

numCandminus1_step is always positive