- Disable tablets in `test_migration_on_existing_raft_topology`.
Because views on tablets are experimental now, we can safely
assume that view building coordinator will start with view build status
on raft.
- Add error injection to pause view building on worker.
Used to pause view building process, there is analogous error injection
in view_builder.
- Do a read barrier in `test_view_in_system_tables`
Increases test stability by making sure that the node sees up-to-date
group0 state and `system.built_views` is synced.
- Wait for view is build in some tests
Increases tests stability by making sure that the view is built.
- Remove xfail marker from `test_tablet_streaming_with_unbuilt_view`
This series fix https://github.com/scylladb/scylladb/issues/21564
and this test should work now.