High MLD fix for MASA, Float code cleanup

[x] High MLD fix for MASA format in negative 10dB input case
[x] Float code cleanup in ivas_init_dec.c, ivas_mc_dec_reconfig, ivas_dirac_dec_render_sf
[x] Fix for LTV crash issue for 10dB case: stereo at 24.4 kbps, 32kHz in, 32kHz out, DTX on

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

MLD scores:
Original inputs:
MLD > 10: 80
MLD > 5 : 143
MLD < 5 : 374

+10dB inputs:
MLD > 10: 215
MLD > 5 : 194
MLD < 5 : 187

-10dB inputs:
MLD > 10: 29
MLD > 5 : 93
MLD < 5 : 475