Remove duplicated code: TBE
The core-coder duplicates several TBE-related functions. This issue is to track the removal of duplications in functions such as:
- wb_tbe_enc_ivas_fx() vs. wb_tbe_enc_fx()
- ivas_wb_tbe_dec_fx() vs wb_tbe_dec_fx()
- fb_tbe_enc_ivas_fx() vs fb_tbe_enc_fx()
- fb_tbe_dec_ivas_fx() vs fb_tbe_dec_fx()
- InitSWBencBuffer_ivas_fx() vs InitSWBencBuffer_fx()
- etc.