Storage: support git + github backed roots (#52192)

go.mod

@@ -42,7 +42,7 @@ require (
 	github.com/go-sql-driver/mysql v1.6.0
 	github.com/go-stack/stack v1.8.0
 	github.com/gobwas/glob v0.2.3
-	github.com/gofrs/uuid v4.0.0+incompatible
+	github.com/gofrs/uuid v4.0.0+incompatible // indirect
 	github.com/gogo/protobuf v1.3.2
 	github.com/golang/mock v1.6.0
 	github.com/golang/snappy v0.0.4
@@ -245,6 +245,7 @@ require (
 	github.com/blugelabs/bluge_segment_api v0.2.0
 	github.com/getkin/kin-openapi v0.94.0
 	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
 	go.etcd.io/etcd/api/v3 v3.5.4
@@ -258,6 +259,7 @@ require (
 	cloud.google.com/go v0.100.2 // indirect
 	github.com/armon/go-metrics v0.3.10 // indirect
 	github.com/cpuguy83/go-md2man/v2 v2.0.2 // indirect
+	github.com/google/go-querystring v1.1.0 // indirect
 	github.com/google/gofuzz v1.2.0 // indirect
 	github.com/gosimple/unidecode v1.0.1 // indirect
 	github.com/hashicorp/go-immutable-radix v1.3.1 // indirect