Set no prefix to fix "IP range no free block error" for test of looker enterprise (#10365) (#17816)

[upstream:1c575ec1b7fe3a731908b461601025a45f90a7ed]

Signed-off-by: Modular Magician <magic-modules@google.com>

Author: modular-magician

.changelog/10365.txt

@@ -0,0 +1,3 @@
+```release-note:none
+
+```

google/services/looker/resource_looker_instance_generated_test.go

@@ -143,9 +143,9 @@ func TestAccLookerInstance_lookerInstanceEnterpriseFullTestExample(t *testing.T)
 	t.Parallel()
 
 	context := map[string]interface{}{
-		"address_name":  acctest.BootstrapSharedTestGlobalAddress(t, "looker-vpc-network-1", acctest.AddressWithPrefixLength(20)),
+		"address_name":  acctest.BootstrapSharedTestGlobalAddress(t, "looker-vpc-network-2"),
 		"kms_key_name":  acctest.BootstrapKMSKeyInLocation(t, "us-central1").CryptoKey.Name,
-		"network_name":  acctest.BootstrapSharedServiceNetworkingConnection(t, "looker-vpc-network-1", acctest.ServiceNetworkWithPrefixLength(20)),
+		"network_name":  acctest.BootstrapSharedServiceNetworkingConnection(t, "looker-vpc-network-2"),
 		"random_suffix": acctest.RandString(t, 10),
 	}