Backport of Docs/CE-749-remove-references-from-consul into release/1.20.x

[hc-github-team-consul-core]

Backport

This PR is auto-generated from #21914 to be assessed for backporting due to the inclusion of the label backport/1.20.

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The person who merged in the original PR is:
@aimeeu
This person should manually cherry-pick the original PR into a new backport PR,
and close this one when the manual backport PR is merged in.

merge conflict error: POST https://api.github.com/repos/hashicorp/consul/merges: 409 Merge conflict []

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

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Description

This PR removes references to HCP Consul Central.

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

• 316a277 - 08708fc - 831b19b - 7f3d954

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[hashicorp-cla-app]

Thank you for your submission! We require that all contributors sign our Contributor License Agreement ("CLA") before we can accept the contribution. Read and sign the agreement

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

Auto approved Consul Bot automated PR