Improve WMOPS performance of tcx_ltp_synth_filter32()

Basic info

The function tcx_ltp_synth_filter32() has IF() inside FOR() loops.

• Float reference:
  • Encoder (float):
  • Decoder (float):
• Fixed point:
  • Encoder (fixed):
  • Decoder (fixed):

Bug description

Ways to reproduce

Box folder: ...\Box_EXTERNAL_IVAS_BASOP_VERIFICATION\issues\issue-xxxx