Map PRODUCT define to keyboard_name (#14372)

* Map `PRODUCT` define to `keyboard_name`

* Fix tests

* Fix last test

keyboards/handwired/pytest/basic/info.json

@@ -1,10 +1,9 @@
 {
-  "maintainer": "qmk",
-  "layouts": {
-    "LAYOUT_custom": {
-      "layout": [
-        { "label": "KC_Q", "matrix": [0, 0], "w": 1, "x": 0, "y": 0 }
-      ]
+    "layouts": {
+        "LAYOUT_custom": {
+            "layout": [
+                { "label": "KC_Q", "matrix": [0, 0], "w": 1, "x": 0, "y": 0 }
+            ]
+        }
     }
-  }
 }