Fix for 3GPP issue 790

[x] [3GPP-Issue #790 (closed)] Fixes improper output with floating point IVAS decoder for 10dB test_sba_plc_system[1-32-PLperc40mblen50-stvFOA-0-32000] test case
[x] Corresponding float changes taken through MR!453: !453 (merged)

EVS 26.444 BE test passes.
decoder pytests:
MLD scores:
Original inputs: 562 failed, 374 skipped
MLD > 10: 46
MLD > 5 : 108
MLD < 5 : 408
+10dB inputs: 562 failed, 374 skipped
MLD > 10: 168
MLD > 5 : 185
MLD < 5 : 209
-10dB inputs: 562 failed, 374 skipped
MLD > 10: 10
MLD > 5 : 50
MLD < 5 : 502

encoder pytests results:
MLD scores:
Original inputs: 562 tests:
MLD > 10: 15
MLD > 5 : 47
MLD < 5 : 500
+10dB inputs: 562 tests:
MLD > 10: 42
MLD > 5 : 133
MLD < 5 : 387
\-10dB inputs: 562 tests:
MLD > 10: 5
MLD > 5 : 21
MLD < 5 : 536