Understand the scope of work required to stabilise ably cocoa tests

[jamienewcomb]

We need to understand what needs to be done so the tests in ably-cocoa are stable

┆Issue is synchronized with this Jira Research by Unito

[lawrence-forooghian]

The internal discussion about #1278 might be worth looking at here, too.

[maratal]

Example of unstable test - #1281

[lawrence-forooghian]

Our next step here will be to investigate the top 40% of test failures (#1330).

[QuintinWillison]

I see that there has been a lot of activity linked to this issue, however there is no clear scope or acceptance criteria that could lead to completion. I believe that since this issue was created we have a much better view of our tests, via @lawrence-forooghian's efforts around observability, as well as plenty of well-defined issues under the failing-test label. Therefore, at this point, I don't think this issue adds any value to our backlog.