[Keyboard] Iris via changes (#8597)

* Change PID to allow differentiation between Rev. 3 and Rev. 4

* Rebadge thumb keys in macro to show physical wiring better

* Add more rules for VIA keymap

keyboards/keebio/iris/rev3/config.h

@@ -22,7 +22,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define PRODUCT_ID      0x1256
 #define DEVICE_VER      0x0300
 #define MANUFACTURER    Keebio
-#define PRODUCT         Iris Keyboard
+#define PRODUCT         Keebio Iris Rev. 3
 #define DESCRIPTION     Split 50 percent ergonomic keyboard
 
 /* key matrix size */