Addressed comments shared in 3gpp issue 668

[x] Addressed comments in #668 (closed)
[x] ivas_tools.c and tools.c instrumentation will be addressed in another MR.

EVS 26.444 BE test passes.
decoder pytests:
MLD scores:
Original inputs: 561 failed, 374 skipped
MLD > 10: 54
MLD > 5 : 124
MLD < 5 : 383
+10dB inputs: 561 failed, 374 skipped
MLD > 10: 179
MLD > 5 : 182
MLD < 5 : 200
-10dB inputs: 561 failed, 374 skipped
MLD > 10: 13
MLD > 5 : 61
MLD < 5 : 487

encoder pytests results:
MLD scores:
Original inputs: 561 tests: 236 passes, 325 failures, 374 skipped
MLD > 10: 16
MLD > 5 : 24
MLD < 5 : 521
+10dB inputs: 561 tests: 261 passes, 300 failures, 374 skipped
MLD > 10: 24
MLD > 5 : 47
MLD < 5 : 490
-10dB inputs: 561 tests: 253 passes, 308 failures, 374 skipped
MLD > 10: 5
MLD > 5 : 18
MLD < 5 : 538