etcd: Cancel waitForInitLock() when client is closing
etcd: Cancel waitForInitLock() when client is closing

Don't rely on timeout if the client is being cancelled. If the client is
closing, a lock can never succeed again.

Signed-off-by: Thomas Graf <5f50a84c1fa3bcff146405017f36aec1a10a9e38@cilium.io>

michi-covalent/cilium,michi-covalent/cilium,tgraf/cilium,cilium/cilium,cilium/cilium,tklauser/cilium,tklauser/cilium,tgraf/cilium,tklauser/cilium,tgraf/cilium,tgraf/cilium,michi-covalent/cilium,tgraf/cilium,tklauser/cilium,tklauser/cilium,cilium-team/cilium,cilium/cilium,michi-covalent/cilium,tgraf/cilium,cilium-team/cilium,cilium/cilium,michi-covalent/cilium,cilium/cilium