Renderer functions integration, float buffers and structure elements cleanup

[x] Binaural renderer unwrap conversion and integration
[x] getDirectPartGains_fx integration
[x] ivas_dirac_dec_render_sf_fx float buffers cleanup
[x] lib rend.c float code cleanup

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

MLD scores:
Original inputs:
MLD > 10: 81
MLD > 5 : 147
MLD < 5 : 369

+10dB inputs:
MLD > 10: 217
MLD > 5 : 196
MLD < 5 : 183

-10dB inputs:
MLD > 10: 31
MLD > 5 : 93
MLD < 5 : 473