Backport of Fix parts of admin-partitions guide into release/1.15.x

[hc-github-team-consul-core]

Backport

This PR is auto-generated from #19621 to be assessed for backporting due to the inclusion of the label backport/1.15.

The below text is copied from the body of the original PR.

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Description

This fixes some of the admin partitions guide. It still does not work for Kind for a couple reasons:

1. we need to use the internal IP of the K8s API (not the external LoadBalanced one):

# not
kubectl config view --output "jsonpath={.clusters[?(@.name=='${CLIENT_CONTEXT}')].cluster.server}"

2. we get TLS issues on the K8s server certs:

2023-11-14T02:56:54.305Z [ERROR] consul-server-connection-manager: ACL auth method login failed: error="rpc error: code = Unauthenticated desc = Post \"https://10.96.0.1/apis/authentication.k8s.io/v1/tokenreviews\": tls: failed to verify certificate: x509: certificate signed by unknown authority (possibly because of \"crypto/rsa: verification error\" while trying to verify candidate authority certificate \"kubernetes\")"
2023-11-14T02:56:54.305Z [ERROR] consul-server-connection-manager: connection error: error="rpc error: code = Unauthenticated desc = Post \"https://10.96.0.1/apis/authentication.k8s.io/v1/tokenreviews\": tls: failed to verify certificate: x509: certificate signed by unknown authority (possibly because of \"crypto/rsa: verification error\" while trying to verify candidate authority certificate \"kubernetes\")"
unable to start Consul server watcher: context canceled

Testing & Reproduction steps

Links

PR Checklist

• updated test coverage
• external facing docs updated
• appropriate backport labels added
• not a security concern

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Overview of commits

• d4ba678

[github-team-consul-core-pr-approver]

Auto approved Consul Bot automated PR

[hc-github-team-consul-core]

🤔 This PR has changes in the website/ directory but does not have a type/docs-cherrypick label. If the changes are for the next version, this can be ignored. If they are updates to current docs, attach the label to auto cherrypick to the stable-website branch after merging.