[Bug]: Standardize the cluster name argument in kubectl cnpg plugin

[sxd]

Is there an existing issue already for this bug?

• [X] I have searched for an existing issue, and could not find anything. I believe this is a new bug.

I have read the troubleshooting guide

• [X] I have read the troubleshooting guide and I think this is a new bug.

I am running a supported version of CloudNativePG

• [X] I have read the troubleshooting guide and I think this is a new bug.

Contact Details

No response

Version

1.24.0

What version of Kubernetes are you using?

1.31

What is your Kubernetes environment?

Self-managed: kind (evaluation)

How did you install the operator?

YAML manifest

What happened?

In the plugin we use different names to refert to a cluster like:

• cluster
• cluster_name
• clusterName

We should standarize the word we use to refer a cluster

Cluster resource

No response

Relevant log output

No response

Code of Conduct

• [X] I agree to follow this project's Code of Conduct