Backport of Add no-op CensusAgent into release/1.11.x

[hc-github-team-secure-vault-core]

Backport

This PR is auto-generated from #19625 to be assessed for backporting due to the inclusion of the label backport/1.11.x.

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

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

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

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This PR introduces some OSS plumbing for the Census Agent.

Addresses: VAULT-13194

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Overview of commits

• e3c5977

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