JVET-AB0069 change the length of the po_sei_processing_order[i] syntax element

See merge request !2433

length change

Rename dynamic_cache to Pool

See merge request jvet/VVCSoftware_VTM!2430

Use strong typed enum for SEI payload type

See merge request jvet/VVCSoftware_VTM!2423

Clean up ISP and use strong typed enum

See merge request jvet/VVCSoftware_VTM!2422

Define named reference index for IBC

See merge request !2429

This class contains a pool of objects that can be used and reused
while minimizing the amount of required memory allocation and
deallocation operations

JVET-T0056: SEI manifest and SEI prefix indication

See merge request jvet/VVCSoftware_VTM!2096

Clean up reading/parsing of number of active refs

See merge request jvet/VVCSoftware_VTM!2427

Use named variable for unset cost

See merge request jvet/VVCSoftware_VTM!2426

Use named constants

See merge request jvet/VVCSoftware_VTM!2425

Fix compilation when disabling REUSE_CU_RESULTS

See merge request jvet/VVCSoftware_VTM!2424

This doesn't change the end result

Clean up DMVR code

See merge request jvet/VVCSoftware_VTM!2421