ivas_dirac_dec_binaural_determine_processing_matrices: converted to fixed point

[x] ivas_dirac_dec_binaural_determine_processing_matrices is converted to fixed point and is integrated at all locations.
[x] Floating point structure members from DIRAC_DEC_BIN_DATA and HRTFS_PARAMBIN_HANDLE cleaned up.

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

MLD scores:
Original inputs:
MLD > 10: 67
MLD > 5 : 139
MLD < 5 : 391

+10dB inputs:
MLD > 10: 198
MLD > 5 : 194
MLD < 5 : 204

-10dB inputs:
MLD > 10: 22
MLD > 5 : 79
MLD < 5 : 496