Fix ticket #447: 16x16 Coefficient Zero Out for MTS with JVET-O0538

• 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.

merged

mentioned in commit 70f166b0

The same change should be done also in the function TransformUnit::getTbAreaAfterCoefZeroOut(), which derives log2ZoTbHeight and log2ZoTbWidth used to calculate remBinsPass1. MR: !864 (merged)

mentioned in merge request !864 (merged)

mentioned in commit 9b72d58c

mentioned in commit 77d7a81f