Port Float MR 2132 (+ follow-ups) to BASOP - "Several small code improvements"

Basic Info

Port MR 2132 from float + the related follow-ups to skip the various in-between steps.

• Original merge requests in float repo:
  • ivas-codec-pc/ivas-codec!2132 (merged)
  • ivas-codec-pc/ivas-codec!2190 (merged)
  • ivas-codec-pc/ivas-codec!2191 (merged)
  • ivas-codec-pc/ivas-codec!2202 (merged)