Fix up go.mod files after reviews

Because of how the previous 100+ commits were done, so changes snuck
thru that properly belong in earlier commits but it's not really
possible to do that without a lot of effort.

We agreed it was OK to "spackle" these cracks with a final commit.

Kubernetes-commit: 21715e6bbd19c932576ff268843d8ead3edb05e4

go.mod

@@ -114,6 +114,7 @@ replace (
 	k8s.io/apimachinery => ../apimachinery
 	k8s.io/apiserver => ../apiserver
 	k8s.io/client-go => ../client-go
+	k8s.io/cloud-provider => ../cloud-provider
 	k8s.io/component-base => ../component-base
 	k8s.io/component-helpers => ../component-helpers
 	k8s.io/controller-manager => ../controller-manager