Do not support nonce in ocsp response

[oulinbao]

Is your feature request related to a problem? Please describe.
I have a FortiWeb and when I used it to connect with Vault with ocsp nonce, it failed.

Describe the solution you'd like
Because FortiWeb must use nonce in ocsp request, so if vault can response with nonce, it will be ok.

Describe alternatives you've considered
None

Explain any additional use-cases
None

Additional context

[stevendpclark]

Thanks @oulinbao for filing the issue, this is a known limitation of the PKI OCSP implementation documented here: https://developer.hashicorp.com/vault/api-docs/secret/pki#ocsp-request

None of the extensions defined in the RFC are supported for requests or responses

I'll keep the issue open for better visibility and if we decide to add support for nonces in OCSP requests. At the moment the Go library that we use doesn't support this feature.