Incorrect URL format for load balancers

[Fedosin]

When creating a load balancer, I get the next error from google API:

Error syncing load balancer: failed to ensure load balancer: failed to create forwarding rule for load balancer (a8811629b918a4c4d8da5705f41f4277(openshift-ingress/router-default)): googleapi: Error 400: Invalid value for field 'resource.target': 'https://compute.googleapis.com/compute/v1/**********************/regions/us-central1/targetPools/a8811629b918a4c4d8da5705f41f4277'. The URL is malformed. Must be a valid In-Project Target Proxy URL or a supported Google API bundle., invalid

This happens because of the change in Google API SDK that was added here with the version bump in #262:

❯ git diff de861a67f32828f69175d064c9847316b1731184~1..HEAD vendor/google.golang.org/api/compute/v1/compute-gen.go
diff --git a/vendor/google.golang.org/api/compute/v1/compute-gen.go b/vendor/google.golang.org/api/compute/v1/compute-gen.go
index a0213951..18c179dd 100644
--- a/vendor/google.golang.org/api/compute/v1/compute-gen.go
+++ b/vendor/google.golang.org/api/compute/v1/compute-gen.go
@@ -1,4 +1,4 @@
-// Copyright 2020 Google LLC.
+// Copyright 2021 Google LLC.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
@@ -78,11 +78,12 @@ var _ = internaloption.WithDefaultEndpoint
 const apiId = "compute:v1"
 const apiName = "compute"
 const apiVersion = "v1"
-const basePath = "https://compute.googleapis.com/compute/v1/projects/"
+const basePath = "https://compute.googleapis.com/compute/v1/"
+const mtlsBasePath = "https://compute.mtls.googleapis.com/compute/v1/"
 
 // OAuth2 scopes used by this API.

basePath has been changed, so targetPoolURL returns incorrect result: https://github.com/kubernetes/cloud-provider-gcp/blob/master/providers/gce/gce_loadbalancer_external.go#L635