keep max TU in #define for possibility of keeping the parameter

TU max/min size are constants in the VVC draft. Reflecting this in the software.

  - Reset MV LUT in I_SLICE only if IBC is enabled.

  - Fix formatting of previous commit.

  - Set inferred value of sign_data_hiding_flag if not present.

  - Fix IBC bugs.
  - Reset motion vector history LUT in all slices.
  - Remove CPR collocated picture check.
  - Fix IBC chroma deblocking edge lookup for dual-tree case.

This is for the case where JVET_M0464_UNI_MTS is disabled

Avoid '#if HEVC_TILES_WPP' duplication

Code was salvaged from !306

AMVR (formely IMV) now has only one mode, which used to be mode #2
- remove SPS imv_mode parameter
- remove encoder configuration for mode #1 (mode #2 replaces mode #1)
- adapt config files to refer tp mode #1
- rename SPS syntax elements and access functions to AMVR

Note: IMV to AMVR renaming in other parts of the software should be done by proponents.

- The M0297 zero-out is also supported for SBT now.
- The zero-out scanning code is moved out of residual_coding_subblock.

Fix of the DQP signaling when there are multiple luma TUs in Single Tree and there is only one TU containing all of the chroma information

- all elements of SPSNext are moved into SPS
- syntax elements of SPS are sorted according to draft (as far as possible)
- comments were added where software and draft diverge

Remove unused contexts and split intra mode contexts into luma and
chroma sets to align with text description

Decoder analyser did not work. This corrects the problem, removes unused
entries and corrects the orders of strings vs enum list.

This reverts commit 3574c11d.