This makes it possible to run the common/test/keyboards build.sh and
makes all the baseline keyboards available as a build artifact (but
currently only in .kmx, not .kmp; this may come as a future update.)
Decided to use the name `baseline` for this set of tests. They can be
used by any project in the repo now. Tests will be treated as shared,
and not modified (except in the case of a buggy test).
* Moves .kmn files, add `&NAME` line (don't use meson templating for
these files)
* Generates reference .kmx files using kmcomp for use as a baseline with
kmcmplib (kmc) tests, and for linux tests
* Updates references in core, kmcmplib, and linux builds
* Renames all the .kmn / .kmx to use a standardized, clean name format
(this was needed for building packages in the core tests)
