Cleanup usage of friendly_name in the code case to avoid future usage

[TimoPtr]

Summary

This PR removes usage of the friendly_name attributes in the codebase mostly in tests so we don't rely on this anymore and new development too.

Checklist

• New or updated tests have been added to cover the changes following the testing guidelines.
• The code follows the project's code style and best_practices.
• The changes have been thoroughly tested, and edge cases have been considered.
• Changes are backward compatible whenever feasible. Any breaking changes are documented in the changelog for users and/or in the code for developers depending on the relevance.
• I have read the Open Home Foundation AI Policy.

Select exactly one option that describes AI usage in this contribution:

• I have not used AI for this contribution.
• AI assistance was used for this contribution.
• AI fully generated the code for this contribution, but I've reviewed and understood it before submitting and will respond without AI during review.

[github-actions]

Test Results

  338 files    370 suites   14m 24s ⏱️
2 960 tests 2 959 ✅ 1 💤 0 ❌
3 136 runs  3 135 ✅ 1 💤 0 ❌

Results for commit 2d9730a.

♻️ This comment has been updated with latest results.