Bump konnectivity network proxy to v0.0.27.

/kind feature

Includes fixes for a few resource leaks.
Set the dependency chain to K/K v0.0.21.

Fixes # N/A

```release-note
NONE
```

```docs
NONE
```

vendor/sigs.k8s.io/apiserver-network-proxy/konnectivity-client/pkg/client/client.go

@@ -114,13 +114,14 @@ func (t *grpcTunnel) serve(c clientConn) {
 			t.pendingDialLock.RUnlock()
 
 			if !ok {
-				klog.V(1).Infoln("DialResp not recognized; dropped")
+				klog.V(1).InfoS("DialResp not recognized; dropped", "connectionID", resp.ConnectID, "dialID", resp.Random)
+				return
 			} else {
 				result := dialResult{
 					err:    resp.Error,
 					connid: resp.ConnectID,
 				}
-				select  {
+				select {
 				case ch <- result:
 				default:
 					klog.ErrorS(fmt.Errorf("blocked pending channel"), "Received second dial response for connection request", "connectionID", resp.ConnectID, "dialID", resp.Random)