-10dB input crash fix, Stereo high MLD case fix, formulate2x2MixingMatrix_fx...

-10dB input crash fix, Stereo high MLD case fix, formulate2x2MixingMatrix_fx integration, struct cleanup

[x] Crash fixes: -10dB input: [ltv-SBA at 128 kbps, 32kHZ in, 32kHz out, BINAURAL_ROOM_REVERB out HR]
[x] High MLD fix: High MLD fix for the test case - stereo at 16.4 kbps, 32kHz in, 16kHz out, DTX on
[x] ASAN fixes and BASOP updates
[x] formulate2x2MixingMatrix_fx integration
[x] fb_mixer table updates
[x] dirac_dec_stack_mem and dirac_output_synthesis_state_structure cleanup

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

MLD scores:
Original inputs:
MLD > 10: 75
MLD > 5 : 142
MLD < 5 : 380

+10dB inputs:
MLD > 10: 209
MLD > 5 : 191
MLD < 5 : 196

-10dB inputs:
MLD > 10: 21
MLD > 5 : 97
MLD < 5 : 479