Adapt the rust.go code to the changes in FFI bindings

[jmartinesp]

This PR will change how EventTimelineItem and other structs related to it are exposed in the bindings, effectively breaking the Go bindings used in this repo.

With these changes the tests pass again, but please let me know if there's anything wrong since I'm not very familiar with Go.

[jmartinesp]

Is there a way to make the checks point to the unmerged branch so we can verify they're ok?

[kegsay]

You need to call the branch names the same thing:

++ curl -s -o /dev/null -w '%{http_code}' https://api.github.com/repos/matrix-org/matrix-rust-sdk/branches/misc/timeline-event-ffi-object-to-record
+ response=404

The linked PR has the branch name test/jme/timeline-event-ffi-object-to-record

[jmartinesp]

Ah damn it, I changed the branch name to avoid the test/ prefix... I'll close the PR and create a new one then, sorry for the noise.