[Bug] Fix Song List configuration for Audio feature

[drashna]

Description

See Title.

But speciflcally, the song list needs to be included in the config.h "stuff" or custom song values will not be respected.

#19714 breaks this, and #19722 further breaks this. I can confirm that this breaks ALL of these configs: https://docs.qmk.fm/#/feature_audio?id=audio-config

This was mentioned by me already: link

If there is a better solution that will respect the settings, I'm open for it, but right now, this is completely broken.

Types of Changes

• Core
• Bugfix

Issues Fixed or Closed by This PR

• Remove usages of config_common.h from config.h files. #19714
• Strip out more of config_common #19722

Checklist

• My code follows the code style of this project: C, Python
• I have read the PR Checklist document and have made the appropriate changes.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• I have actually tested the changes and verified that they work and don't break anything (as well as I can manage).