Scuemata: Checking json validity by enabling skipped tests (#34385) (#35226)

* Make sure we don't skip any tests - refactoring

* Remove commented lines

* Move test folder

(cherry picked from commit 4c8ce8a450)

Co-authored-by: Dimitris Sotirakis <dimitrios.sotirakis@grafana.com>

pkg/schema/load/testdata/artifacts/panels/basic-table.json

@@ -7,7 +7,6 @@
         "filterable": false
       },
       "decimals": 3,
-      "mappings": [],
       "unit": "watt"
     },
     "overrides": [
@@ -82,4 +81,4 @@
     "maj": 0,
     "min": 0
   }
-}
+}