Backport of Add notes around OCSP GET request issue into release/1.14.x

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

Backport

This PR is auto-generated from #25745 to be assessed for backporting due to the inclusion of the label backport/1.14.x.

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Warning automatic cherry-pick of commits failed. If the first commit failed,
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The person who merged in the original PR is:
@stevendpclark
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/vault/merges: 409 Merge conflict []

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

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• Fix some broken TOC links
• Add a note in the api-docs and in the considerations page around Vault having issues with OCSP GET requests and that POST requests should be preferred.
• Add existing known issue to all branches that are affected.

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Overview of commits

• 09294e8

[hashicorp-cla]

All committers have signed the CLA.

[github-actions]

CI Results:
All Go tests succeeded! ✅

[github-actions]

Build Results:
All builds succeeded! ✅

[victorr]

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