Migrate rgblight.pin and RGB_DI_PIN to ws2812.pin (#20303)

keyboards/grid600/press/config.h

@@ -17,7 +17,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #pragma once
 
-#define RGB_DI_PIN B6
   #define RGBLED_NUM 4
   #define RGBLIGHT_HUE_STEP 10
   #define RGBLIGHT_SAT_STEP 17

keyboards/grid600/press/info.json

@@ -12,6 +12,9 @@
         "cols": ["F1", "F4", "F5", "F6"],
         "rows": ["F0"]
     },
+    "ws2812": {
+        "pin": "B6"
+    },
     "diode_direction": "COL2ROW",
     "processor": "atmega32u4",
     "bootloader": "atmel-dfu",