Consider merging CqlSession back into Session

Description

It feels a bit weird: that seems to imply that there are / will be other types of Sessions, which isn't really the case.
Since CQL is supported out of the box and the processors will likely never be disabled, the methods can be moved up into Session.

Don't forget to update the examples in the manual.

Environment

None

Pull Requests

None
Fixed

Assignee

Olivier Michallat

Reporter

Olivier Michallat

Labels

None

PM Priority

None

Affects versions

None

Fix versions

Pull Request

None

Doc Impact

None

Size

None

External issue ID

None

External issue ID

None

Priority

Trivial
Configure