Integration of ivas_entropy_coder_common.c and ivas_omasa_com.c funcs

[x] Integration of all the functions present in ivas_entropy_coder_common.c and ivas_omasa_com.c except ivas_get_stereo_panning_gains in lib_enc

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

MLD scores:
Original inputs:
MLD > 10: 57
MLD > 5 : 122
MLD < 5 : 418

+10dB inputs:
MLD > 10: 186
MLD > 5 : 197
MLD < 5 : 214

-10dB inputs:
MLD > 10: 19
MLD > 5 : 59
MLD < 5 : 519