OpenAPI: some PKI unauthed endpoints aren't being marked as such

[cipherboy]

Describe the bug

Some OpenAPI endpoints for PKI aren't being marked as such:

OpenAPI data: map[description:Fetch an issuer's Certificate Revocation Log (CRL). get:map[operationId:getPkiIssuerIssuer_refCrl responses:map[200:map[content:map[application/json:map[schema:map[$ref:#/components/schemas/PkiIssuerCrlResponse]]] description:OK]] tags:[secrets]] parameters:[map[description:Reference to a existing issuer; either "default" for the configured default issuer, an identifier or the name assigned to the issuer. in:path name:issuer_ref required:true schema:map[default:default type:string]]]]
Unauthed endpoint is not marked unauthenticated in OpenAPI data: /pki/issuer/{issuer_ref}/crl/delta/pem->issuer/default/crl/delta/pem

To Reproduce
Steps to reproduce the behavior:

1. Run vault secrets enable pki
2. Run vault read sys/internal/specs/openapi
3. See error: some PKI endpoints aren't marked unauthed.

Expected behavior

PKI endpoints which are unauthed should be marked with x-vault-unauthenticated per our OpenAPI spec :-)

Environment:

main

cc: @averche :-)