chore(spanner): temporarily skip spanner tests (#10071)

Updates #10070
Updates #10069
diff --git a/spanner/client_test.go b/spanner/client_test.go
index be8ca90..1c19636 100644
--- a/spanner/client_test.go
+++ b/spanner/client_test.go
@@ -3987,6 +3987,7 @@
 }
 
 func TestClient_CallOptions(t *testing.T) {
+	t.Skip("https://github.com/googleapis/google-cloud-go/issues/10069")
 	t.Parallel()
 	co := &vkit.CallOptions{
 		CreateSession: []gax.CallOption{
diff --git a/spanner/sessionclient_test.go b/spanner/sessionclient_test.go
index 27780fe..34afa96 100644
--- a/spanner/sessionclient_test.go
+++ b/spanner/sessionclient_test.go
@@ -424,6 +424,7 @@
 }
 
 func TestBatchCreateSessions_ServerExhausted(t *testing.T) {
+	t.Skip("https://github.com/googleapis/google-cloud-go/issues/10070")
 	t.Parallel()
 
 	numChannels := 4