Make use of kubernetes client-go v4

* client-go v4.0.0-beta0
* remove unnecessary methods for tpr object
* rest client: use interface instead of structure pointer
* proper names for constants; some clean up for log messages
* remove teams api client from controller and make it per cluster

pkg/util/filesystems/ext234.go

@@ -37,5 +37,5 @@ func (c *Ext234Resize) ResizeFilesystem(deviceName string, commandExecutor func(
 		(strings.Contains(out, "on-line resizing required") && ext2fsSuccessRegexp.MatchString(out)) {
 		return nil
 	}
-	return fmt.Errorf("unrecognized output: %s, assuming error", out)
+	return fmt.Errorf("unrecognized output: %q, assuming error", out)
 }