Require 'x'/'y' properties for LED/RGB Matrix layout (#24997)

data/schemas/keyboard.jsonschema

@@ -554,6 +554,7 @@
                     "items": {
                         "type": "object",
                         "additionalProperties": false,
+                        "required": ["x", "y"],
                         "properties": {
                             "matrix": {
                                 "type": "array",
@@ -640,6 +641,7 @@
                     "items": {
                         "type": "object",
                         "additionalProperties": false,
+                        "required": ["x", "y"],
                         "properties": {
                             "matrix": {
                                 "type": "array",