Resolve "Rename EstimateTCXNoiseLevel_ivas_fx()"

• Related issues: #2390 (closed)
• Requested reviewers: @azizia

Reason why this change is needed

• Rename EstimateTCXNoiseLevel_ivas_fx() to EstimateTCXNoiseLevel_fx(), to be inline with naming convention

Description of the change

• Rename EstimateTCXNoiseLevel_ivas_fx() to EstimateTCXNoiseLevel_fx(), to be inline with naming convention

Affected operating points

• All operating points are BE.

Closes #2390 (closed)