Remove duplicated code: various functions
I identified a couple of other functions to be harmonized. These function names have the pattern `ivas_name_fx()` vs. `name_fx()`, so it was not evident from the first look that they both belong to the core-coder and contain a similar code.
I have added these function to the table at https://forge.3gpp.org/rep/sa4/audio/ivas-basop/-/wikis/Potential-Duplicates and propose a harmonization at .
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issue