Improve fix: now merge splitting works correctly for independent layers, even those not including layer 0.

With msg level ERROR the message is printed to stderr

This reverts commit 9eca063e.

Bugfix for bugs 1 and 3 described in Y0190.
With adoption of Y0237 option C, legal bitstreams now and in the future cannot set gci_num_additional_bits to values in the range 1 to 5.
Decoder behaviour if it encounters such values is non-normative.

Align VTM with spec: fix inference value of pps_scaling_win_xxx_offset (equal to conformance window when not present).

: Addition of deallocation of MVP SEI
: Removal of unnecessary editorial mistakes

Uses the parameters sets of the current picture instead of first found.

- indication with SEI message
- skip estimation of CCLM in RASL frames
- PH syntax ph_dmvr_disabled_flag set to 1 in RASL frames
- disabling TMVP in RASL frames