ASAN_MSAN_USAN_Warnings_LTV_Fixes

[x] Few ASAN errors fixed.
[x] Few MSAN errors for SBA path fixed.
[x] Corrected Q factor in non_linearity_ivas_fx.
[x] Warnings fixes.
[x] Clean up of lib_rend.c.

EVS 26.444 BE test passes.
pytests results: 588 failed, 381 skipped

MLD scores:
Original inputs:
MLD > 10: 112; Out of these, 51 cases are PLC
MLD > 5 : 99
MLD < 5 : 377

+10dB inputs:
MLD > 10: 315
MLD > 5 : 113
MLD < 5 : 160

-10dB inputs:
MLD > 10: 69
MLD > 5 : 63
MLD < 5 : 456