Backport of docs: Update references for transparent proxy with peers into release/1.13.x

[hc-github-team-consul-core]

Backport

This PR is auto-generated from #14070 to be assessed for backporting due to the inclusion of the label backport/1.13.

WARNING automatic cherry-pick of commits failed. Commits will require human attention.

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

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Description

Did another pass through of docs re: tproxy.

One thing I noticed was that it's very hard to navigate from Transparent Proxy to any of the relevant information (service-registration and dns)

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[kisunji]

Already merged: https://github.com/hashicorp/consul/commit/f384a4e8ab07835cbd55c27caaec90d2b31d5d5d