feat: Event when Robot Node is removed because name changed

[apricote]

TL;DR

Emit Warning event when we mark a Node for removal because the Node.Name does not match RobotServer.Name

Expected behavior

We recently introduced Kubernetes Events in #598. I tried to identify all code-paths that should emit a warning, but missed this one. Based on the actions taken after this code path (Node is removed from cluster) I think this warrants an event to make understanding this easier for cluster operators.

hcloud-cloud-controller-manager/hcloud/instances_util.go

Lines 92 to 95 in 2f339d2

	// check whether name matches - otherwise this server does not belong to the respective node anymore
	if server.Name != node.Name {
	return nil, nil
	}

[github-actions]

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