Harmonize getTcxonly_ivas_fx(), getTcxonly(), getTcxonly_fx()
# Bug description In float, we currently have only one instance of `getTcxOnly()`, however, in BASOP, there are currently three different versions: * `getTcxonly_ivas_fx()` * `getTcxonly()` * `getTcxonly_fx()` Unless this is not possible, `getTcxonly_fx()` should be brought inline with the floating-point code, used throughout the BASOP code and the other instances should be removed. This has to be a BE change.
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