Provide an helper script to regenerate the intermediate authority:
- create a CSR
- sign it with root certificate
- assign it to pki_vault
- update signing role
Bootstrap instructions updated with new multi-issuer procedure.
References:
- https://developer.hashicorp.com/vault/tutorials/pki/pki-engine
- https://developer.hashicorp.com/vault/api-docs/secret/pki
Ref T2112