Actually enforce dashboard schema on devenv (#53797)

* Relocate dashboards test so it runs

* Cover newer schema versions in stripnulls

* Strip nulls and remove iteration fields

* Fix fiscalYearStartMonth bounds

* Fix up and format dashboard schema

* Update thema, tidy Go dependencies

go.mod

@@ -102,11 +102,11 @@ require (
 	go.opentelemetry.io/otel/trace v1.6.3
 	golang.org/x/crypto v0.0.0-20220622213112-05595931fe9d
 	golang.org/x/exp v0.0.0-20220613132600-b0d781184e0d
-	golang.org/x/net v0.0.0-20220615171555-694bf12d69de // indirect
+	golang.org/x/net v0.0.0-20220722155237-a158d28d115b // indirect
 	golang.org/x/oauth2 v0.0.0-20220608161450-d0670ef3b1eb
-	golang.org/x/sync v0.0.0-20220601150217-0de741cfad7f
+	golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4
 	golang.org/x/time v0.0.0-20220609170525-579cf78fd858
-	golang.org/x/tools v0.1.11
+	golang.org/x/tools v0.1.12
 	gonum.org/v1/gonum v0.11.0
 	google.golang.org/api v0.74.0
 	google.golang.org/grpc v1.45.0
@@ -227,7 +227,7 @@ require (
 	go.opencensus.io v0.23.0 // indirect
 	go.uber.org/atomic v1.9.0
 	go.uber.org/goleak v1.1.12 // indirect
-	golang.org/x/sys v0.0.0-20220615213510-4f61da869c0c // indirect
+	golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f // indirect
 	golang.org/x/text v0.3.7
 	golang.org/x/xerrors v0.0.0-20220411194840-2f41105eb62f // indirect
 	google.golang.org/appengine v1.6.7 // indirect
@@ -247,7 +247,7 @@ require (
 	github.com/golang-migrate/migrate/v4 v4.7.0
 	github.com/google/go-github/v45 v45.2.0
 	github.com/grafana/dskit v0.0.0-20211011144203-3a88ec0b675f
-	github.com/grafana/thema v0.0.0-20220726124731-b8017e278cc1
+	github.com/grafana/thema v0.0.0-20220816214754-af057f99a2dd
 	github.com/jmoiron/sqlx v1.3.5
 	go.etcd.io/etcd/api/v3 v3.5.4
 	go.opentelemetry.io/contrib/propagators/jaeger v1.6.0