quantum: remove direct quantum.h includes (#21507)

quantum/matrix.c

@@ -20,7 +20,8 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include "util.h"
 #include "matrix.h"
 #include "debounce.h"
-#include "quantum.h"
+#include "atomic_util.h"
+
 #ifdef SPLIT_KEYBOARD
 #    include "split_common/split_util.h"
 #    include "split_common/transactions.h"