crypto: add ocsp_request ClientHelloParser::Reset

I noticed that ocsp_request is not being reset in
ClientHelloParser::Reset. I've not been able to figure out the
the reason for this and wanted to bring this up just in case this
was overlooked and should be reset.

PR-URL: https://github.com/nodejs/node/pull/17753


Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: James M Snell <jasnell@gmail.com>