Backport of docs: minimal Consul policy for Nomad agents needs node:write into stable-website

[hc-github-team-nomad-core]

Backport

This PR is auto-generated from #23800 to be assessed for backporting due to the inclusion of the label backport/website.

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

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Since Consul 1.15 (hashicorp/consul#16097) Consul client agent only uses the agent token to perform anti-entropy after you deregister a service via the Agent API. so the Consul client agent must have its own agent token.

Internal ref: https://hashicorp.atlassian.net/browse/NET-10360

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Overview of commits

• c1362c0

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