High MLD cases fixes, LTV crash fixes, precision optimization for changes in MR!521

[x] High MLD cases fixed for OMASA format with scaling changes in dec_tcx_fx
[x] Fix for LTV crash issues introduced with BASOP addition
[x] Enhancing precision in Decimate_allpass_steep_fx32

• EVS 26.444 BE test passes.
• decoder pytests:
  MLD scores:
  Original inputs: 562 failed, 374 skipped
  MLD > 10: 5
  MLD > 5 : 53
  MLD < 5 : 504
  +10dB inputs: 562 failed, 374 skipped
  MLD > 10: 89
  MLD > 5 : 177
  MLD < 5 : 296
  -10dB inputs: 562 failed, 374 skipped
  MLD > 10: 2
  MLD > 5 : 12
  MLD < 5 : 548
• encoder pytests results:
  MLD scores:
  Original inputs: 562 tests:
  MLD > 10: 18
  MLD > 5 : 67
  MLD < 5 : 477
  +10dB inputs: 562 tests:
  MLD > 10: 68
  MLD > 5 : 122
  MLD < 5 : 372
  -10dB inputs: 562 tests:
  MLD > 10: 5
  MLD > 5 : 24
  MLD < 5 : 533