Upgrade cloud.google.com/go/storage to v1.16.0

Closes hashicorp#11978

changelog/11979.txt

@@ -0,0 +1,3 @@
+```release-note:improvement
+storage/gcs: Upgrade cloud.google.com/go/storage dependency to v1.16.0
+```

go.mod

@@ -7,9 +7,9 @@ replace github.com/hashicorp/vault/api => ./api
 replace github.com/hashicorp/vault/sdk => ./sdk
 
 require (
-	cloud.google.com/go v0.56.0
+	cloud.google.com/go v0.86.0
 	cloud.google.com/go/spanner v1.5.1
-	cloud.google.com/go/storage v1.6.0
+	cloud.google.com/go/storage v1.16.0
 	github.com/Azure/azure-storage-blob-go v0.11.0
 	github.com/Azure/go-autorest/autorest v0.11.17
 	github.com/Azure/go-autorest/autorest/adal v0.9.11
@@ -51,8 +51,9 @@ require (
 	github.com/go-sql-driver/mysql v1.5.0
 	github.com/go-test/deep v1.0.7
 	github.com/gocql/gocql v0.0.0-20210401103645-80ab1e13e309
-	github.com/golang/protobuf v1.4.2
-	github.com/google/go-cmp v0.5.5
+	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
+	github.com/golang/protobuf v1.5.2
+	github.com/google/go-cmp v0.5.6
 	github.com/google/go-github v17.0.0+incompatible
 	github.com/google/go-metrics-stackdriver v0.2.0
 	github.com/hashicorp/consul-template v0.26.0
@@ -166,15 +167,16 @@ require (
 	go.uber.org/atomic v1.6.0
 	go.uber.org/goleak v1.1.10
 	golang.org/x/crypto v0.0.0-20210513164829-c07d793c2f9a
-	golang.org/x/net v0.0.0-20210510120150-4163338589ed
-	golang.org/x/oauth2 v0.0.0-20200107190931-bf48bf16ab8d
+	golang.org/x/net v0.0.0-20210614182718-04defd469f4e
+	golang.org/x/oauth2 v0.0.0-20210628180205-a41e5a781914
 	golang.org/x/sync v0.0.0-20210220032951-036812b2e83c // indirect
-	golang.org/x/sys v0.0.0-20210514084401-e8d321eab015
+	golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c
 	golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1
-	golang.org/x/tools v0.0.0-20210101214203-2dba1e4ea05c
-	google.golang.org/api v0.29.0
-	google.golang.org/grpc v1.29.1
-	google.golang.org/protobuf v1.25.0
+	golang.org/x/tools v0.1.4
+	google.golang.org/api v0.50.0
+	google.golang.org/genproto v0.0.0-20210701191553-46259e63a0a9 // indirect
+	google.golang.org/grpc v1.39.0
+	google.golang.org/protobuf v1.27.1
 	gopkg.in/mgo.v2 v2.0.0-20180705113604-9856a29383ce
 	gopkg.in/ory-am/dockertest.v3 v3.3.4
 	gopkg.in/square/go-jose.v2 v2.5.1