Float code cleanup, BASOP/instrumentation addition, Issue 837, 842 fix

• EVS 26.444 BE test passes.
• decoder pytests:
  MLD scores:
  Original inputs: 562 failed, 374 skipped
  MLD > 10: 7
  MLD > 5 : 79
  MLD < 5 : 476
  +10dB inputs: 562 failed, 374 skipped
  MLD > 10: 103
  MLD > 5 : 183
  MLD < 5 : 276
  -10dB inputs: 562 failed, 374 skipped
  MLD > 10: 2
  MLD > 5 : 16
  MLD < 5 : 544
• 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 : 531