Imlement `GetOnly` method

[anisurrahman75]

• We need to implement a GetOnly or similar type method to retrieve the value without pop from the queue.
• Once we get that, we try to create a PendingTask. If we succeed, we'll pop from the queue; otherwise, we keep it as is for the next reconcile.

[anisurrahman75]

https://github.com/kubernetes/client-go/blob/master/util/workqueue/queue.go#L30