Flaky test: latest_binary_is_backward_compatible_and_follows_blocks_created_by_genesis_binary

[AurelienFT]

Source https://github.com/FuelLabs/fuel-core/actions/runs/11571921587/job/32211080249?pr=2398

---- backward_compatibility::latest_binary_is_backward_compatible_and_follows_blocks_created_by_genesis_binary stdout ----
thread 'backward_compatibility::latest_binary_is_backward_compatible_and_follows_blocks_created_by_genesis_binary' panicked at forkless-upgrade/src/backward_compatibility.rs:118:14:
Timed out waiting for block import 8: Elapsed(())
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

[rafal-ch]

There's been an attempt to fix this, which helped, but seems like not to the full extent.

One additional idea was to run these tests one-by-one instead of in parallel by leveraging the --test-threads=1 parameter, because maybe different instances of these tests can still interfere with each other.

[AurelienFT]

Yes but this would slow the CI too much. I think it's better to find a way that they work together