[allow regression] [non-BE] Resolve "OSBA rendering to Mono and Stereo for <96kbps is significantly quieter" in BASOP

• Related issues: ivas-codec-pc/ivas-codec#1518 (closed)
• Requested reviewers:

Reason why this change is needed

• see float MR ivas-codec-pc/ivas-codec!2534 (merged)