Move encoder config to data driven (#19923)

Co-authored-by: Nick Brassel <nick@tzarc.org>

keyboards/keebio/iris/rev5/info.json

@@ -4,6 +4,11 @@
         "pid": "0x5256",
         "device_version": "5.0.0"
     },
+    "encoder": {
+        "rotary": [
+            {"pin_a": "B2", "pin_b": "B3"}
+        ]
+    },
     "backlight": {
         "pin": "B5",
         "levels": 5
@@ -15,7 +20,14 @@
         "speaker": "C6"
     },
     "split": {
-        "soft_serial_pin": "D0"
+        "soft_serial_pin": "D0",
+        "encoder": {
+            "right": {
+                "rotary": [
+                    {"pin_a": "F7", "pin_b": "F6"}
+                ]
+            }
+        }
     },
     "processor": "atmega32u4",
     "bootloader": "qmk-dfu"