Fix worker label

[alicefr]

The correct label for workers is node-role.kubernetes.io/worker="" not node-role.kubernetes.io/worker="worker"

Summary by Sourcery

Bug Fixes:

• Fix worker node labeling by setting node-role.kubernetes.io/worker to an empty string instead of "worker" when joining non-control-plane nodes.

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Update the worker node Kubernetes label applied during cluster join so it matches the standard empty-string value expected by Kubernetes and related tooling.

Flow diagram for applying correct Kubernetes worker label during cluster join

flowchart TD
    A[Cluster.Join called] --> B{opts.IsControlPlane}
    B -- true --> C[Do not set worker label]
    B -- false --> D[Set labels for node-role.kubernetes.io/worker = ""]
    D --> E[Apply labels to node]
    C --> E

Loading

File-Level Changes

Change	Details	Files
Set the Kubernetes worker node role label value to an empty string instead of "worker" when joining non-control-plane nodes.	Change the value assigned to the node-role.kubernetes.io/worker label for non-control-plane joins from "worker" to an empty string Preserve existing behavior of merging user-provided labels before applying the worker role label	internal/cluster/join.go

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