Clear connection state when `connectionStateTtl` elapsed

[owenpearson]

Spec: RTN15g

Note that it is not sufficient to just do this on transition to suspended (see RTN15g1)

[sync-by-unito]

➤ Automation for Jira commented:

The link to the corresponding Jira issue is https://ably.atlassian.net/browse/SDK-3141

[owenpearson]

implemented by #394