Enable more jstests and/or Go driver tests for sessions

[AlekSi]

My objective is to understand what the tests do and how they work before just adding them to our CI.

### Tasks
- [ ] [end_sessions_command.js](https://github.com/mongodb/mongo/blob/master/jstests/noPassthrough/end_sessions_command.js)
- [ ] [libs/kill_sessions.js](https://github.com/mongodb/mongo/blob/master/jstests/libs/kill_sessions.js)
- [ ] [kill_pinned_cursor.js](https://github.com/mongodb/mongo/blob/master/jstests/sharding/kill_pinned_cursor.js#L242-L243)