Update go mod and vendor in client dir to 0.28.0

client/vendor/k8s.io/api/apiserverinternal/v1alpha1/generated.proto

@@ -42,6 +42,11 @@ message ServerStorageVersion {
   // The encodingVersion must be included in the decodableVersions.
   // +listType=set
   repeated string decodableVersions = 3;
+
+  // The API server can serve these versions.
+  // DecodableVersions must include all ServedVersions.
+  // +listType=set
+  repeated string servedVersions = 4;
 }
 
 // Storage version of a specific resource.