CD Release bf209f2 dev

ci: disable OSX build in komodod_cd workflow

Turn off the osx-build job (if: false) and unwire it from the release
pipeline so Linux + Windows CD releases still publish:

- osx-build: if: false (kept in the file for easy re-enable)
- publish-release: drop osx-build from needs, remove the komodo-osx
  download step and the OSX release-asset upload step

Otherwise a skipped osx-build dependency would skip publish-release
entirely and no release would be produced.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>