LTV crash fix, MLD improvements

[x] Fix Q factor of a buffer in core coder
[x] Fix in ivas_dirac_dec_output_synthesis_process_subframe_psd_ls_fx for q factor of intermediate variable
[x] MLD improvement for stereo at 48 kbps, 16 kHz in, 16 kHz out, DTX on, JBM Prof 5
[x] Fix for High MLD SBA at 96 kbps, 48kHz in, 48kHz out, FOA out
[x] LTV crash fix for case: ltv-SBA at 256 kbps, 48kHz in, 48kHz out, PCA, BINAURAL out
[x] Float code clean up changes

• EVS 26.444 BE test passes.
• decoder pytests:
  MLD scores:
  Original inputs: 562 failed, 374 skipped
  MLD > 10: 3
  MLD > 5 : 45
  MLD < 5 : 514
  +10dB inputs: 562 failed, 374 skipped
  MLD > 10: 52
  MLD > 5 : 155
  MLD < 5 : 355
  -10dB inputs: 562 failed, 374 skipped
  MLD > 10: 0
  MLD > 5 : 7
  MLD < 5 : 555
• encoder pytests results:
  MLD scores:
  Original inputs: 562 tests:
  MLD > 10: 18
  MLD > 5 : 67
  MLD < 5 : 477
  +10dB inputs: 562 tests:
  MLD > 10: 69
  MLD > 5 : 122
  MLD < 5 : 371
  -10dB inputs: 562 tests:
  MLD > 10: 5
  MLD > 5 : 24
  MLD < 5 : 533