Backport of docs: re-organize service and node lookups for Consul Enterprise into stable-website

[hc-github-team-consul-core]

Backport

This PR is auto-generated from #14389 to be assessed for backporting due to the inclusion of the label type/docs-cherrypick.

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

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Description

Refactor enterprise node and service lookups into their respective sections, as opposed to having enterprise lookups in its own section.

Testing & Reproduction steps

• In the case of bugs, describe how to replicate
• If any manual tests were done, document the steps and the conditions to replicate
• Call out any important/ relevant unit tests, e2e tests or integration tests you have added or are adding

Links

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PR Checklist

• updated test coverage
• external facing docs updated
• not a security concern

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Overview of commits

• 9e726e7