BASOP and instrumentation changes in lib_dec and lib_rend

EVS 26.444 BE test passes.
pytests results: 597 failed, 381 skipped

MLD scores:
Original inputs:
MLD > 10: 57
MLD > 5 : 121
MLD < 5 : 419

+10dB inputs:
MLD > 10: 186
MLD > 5 : 193
MLD < 5 : 218

-10dB inputs:
MLD > 10: 19
MLD > 5 : 58
MLD < 5 : 520