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/dashboards/basic.json

@@ -58,7 +58,6 @@
             "filterable": false
           },
           "decimals": 3,
-          "mappings": [],
           "unit": "watt"
         },
         "overrides": [
@@ -150,4 +149,4 @@
   "title": "with table",
   "uid": "emal8gQMz",
   "version": 2
-}
+}