gce: Don't reconcile routes when running with "gce" networking.

If running with GCE "native" networking, we do not need the route
controller (and it causes problems); we turn it off by setting
--configure-cloud-routes=false.

In general we do not need the gkenetworkparams controller (and it
complains about missing CRDs).  We will turn it off in future, but it
isn't in the images we are using currently.

pkg/model/components/gcpcloudcontrollermanager.go

@@ -57,6 +57,24 @@ func (b *GCPCloudControllerManagerOptionsBuilder) BuildOptions(options interface
 	if ccmConfig.ClusterCIDR == "" {
 		ccmConfig.ClusterCIDR = clusterSpec.Networking.PodCIDR
 	}
+
+	if clusterSpec.Networking.GCE != nil {
+		// "GCE" networking mode is called "ip-alias" or "vpc-native" on GKE.
+		// We don't need to configure routes if we are using "real" IPs.
+		ccmConfig.ConfigureCloudRoutes = fi.PtrTo(false)
+	}
+
+	if ccmConfig.Controllers == nil {
+		ccmConfig.Controllers = []string{
+			"*",
+
+			// Don't run gkenetworkparamset controller, looks for some CRDs (GKENetworkParamSet and Network) which are only installed on GKE
+			// However, the version we're current running doesn't support this controller anyway, so we need to introduce this later,
+			// possibly based on the image version.
+			// "-gkenetworkparams",
+		}
+	}
+
 	if ccmConfig.Image == "" {
 		// TODO: Implement CCM image publishing
 		switch b.KubernetesVersion.Minor {