#1275 Add OpenSSL.SSL.Connection.session_reused API.

[adiroiban]

Scope

Fixes #1275

This add the SSL.Connection API added in https://github.com/pyca/cryptography/issues/9969

Changes

Add the API as int, not at boolean. Maybe it should be boolean.

Add tests for TLS 1.2 and TLS 1.3

In TLS 1.3 the master key is not the same for reused session.

Still WIP