Add Cassandra 4.0 to our build matrix

Description

Run integration tests against C* 4.0, in the adhoc / nightly schedules (not for every commit).

Environment

None

Pull Requests

None

Status

Assignee

Unassigned

Reporter

Jorge Bay Gondra

Reviewer

None

Fix versions

None

Labels

None

Components

None

PM Priority

None

Pull Request

None

Priority

Major
Configure