Fix vendoring for graduation of scheduling/v1alpha1 API to v1

module k8s.io/api@latest (v0.36.2) does not contain package
k8s.io/api/scheduling/v1alpha1. Hypershift still has dependencies
that import the removed package.

So, created a compatability shim in the vendor directory that
re-exports scheduling/v1 types as v1alpha1 using Go type aliases.

Author: sadasu

vendor/k8s.io/api/scheduling/v1alpha1/doc.go

@@ -212,6 +212,7 @@ k8s.io/api/rbac/v1
 k8s.io/api/rbac/v1alpha1
 k8s.io/api/rbac/v1beta1
 k8s.io/api/scheduling/v1
+k8s.io/api/scheduling/v1alpha1
 k8s.io/api/scheduling/v1beta1
 k8s.io/api/storage/v1
 k8s.io/api/storage/v1alpha1