Upload crash reports to test observability server

[lawrence-forooghian]

When the test suite crashes (e.g. #615) we are not uploading crash reports the test observability server. This means that the crash reports do not appear on the failure page, and instead we have to download the full Xcode logs GitHub artifact. This file can be enormous and takes a while to download. We should upload the crash reports to the test observability server like we do in ably-cocoa (see this commit) so that they can be viewed on the failure details page (example).

[sync-by-unito]

➤ Automation for Jira commented:

The link to the corresponding Jira issue is https://ably.atlassian.net/browse/SDK-3453