Fix Flaky Test

[insipx]

Is your feature request related to a problem?

libxmtp/bindings_ffi/src/mls.rs

Line 1044 in 75ee4ae

async fn test_conversation_streaming() {

Test is flaking b/c the streamed messages are arriving too slow to one end of the stream. Calls to tokio::sleep are supposed to give time for messages to arrive but depending on architecture/system speed this varies.

Describe the solution to the problem

It would be great to use async-barrier for these tests in order to guarantee sync points and avoid flakiness

Describe the uses cases for the feature

No response

Additional details

No response