Failing tests overview

I'm going over all known flaky tests and try to summarize them here such that this can serve as an overview.

- [ ] `test_client_timeout` https://github.com/dask/distributed/issues/5703

Few failures on test report
- [ ] `test_file_descriptor` https://github.com/dask/distributed/issues/4045
- [ ] `test_tls_specific ` https://github.com/dask/distributed/issues/4215

Xfailed
- [x] https://github.com/dask/distributed/issues/5621
- [ ] `test_stress_creation_and_deletion` https://github.com/dask/distributed/issues/5388 https://github.com/dask/distributed/issues/5172
- [ ] `test_no_threads_lingering` https://github.com/dask/distributed/issues/5049
- [ ] `test_restart_during_computation` https://github.com/dask/distributed/issues/4956
- [ ] `test_adaptive_scale_down_override`
- [ ] `test_actor.py::test_linear_access`
- [ ] `test_auto_normalize_collection`
- [ ] `test_auto_normalize_collection_sync`
- [ ] `test_nested_prioritization` https://github.com/dask/dask/pull/6807
- [ ] `test_no_threads_lingering` https://github.com/dask/dask/pull/5409
- [ ] `test_annotations_survive_optimization` https://github.com/dask/dask/issues/7036
- [ ] `test_no_unnecessary_imports_on_worker`
- [ ] `test_pubsub.py::test_basic`
- [ ] `test_scheduler.py::test_non_existent_worker`
- [ ] `test_scheduler.py::test_idle_timeout`
- [ ] `test_utils_perf.py::test_gc_diagnosis_rss_win`
- [ ] `test_worker.py::test_upload_large_file`
- [ ] `test_worker.py::test_share_communication`
- [ ] `test_worker.py::test_dont_overlap_communications_to_same_worker`
- [ ] `test_worker.py::test_wait_for_outgoing`

Skipped randomly
- [ ] `test_map` https://github.com/dask/distributed/issues/5007
- [ ] `test_as_completed_with_results_no_raise` (also failures seen) https://github.com/dask/distributed/issues/4512

Marked rerun / flaky
- [ ] `test_statistical_profiling` https://github.com/dask/distributed/issues/4974
- [ ] `test_steal_twice` https://github.com/dask/distributed/issues/4957
- [ ] `test_AllProgress_lost_key` https://github.com/dask/distributed/issues/4915
- [ ] `test_scale_up_down ` https://github.com/dask/distributed/issues/4905
- [ ] `test_target_duration` https://github.com/dask/distributed/issues/4859
- [ ] `test_profile` https://github.com/dask/distributed/issues/4619
- [ ] `test_idle_timeout` https://github.com/dask/distributed/issues/4498
- [ ] `test_wait_for_outgoing` https://github.com/dask/distributed/issues/4417
- [ ] `test_profile_server ` https://github.com/dask/distributed/issues/4251
- [ ] `test_broken_worker_during_computation` https://github.com/dask/distributed/issues/4173
- [ ] `test_pid_file ` https://github.com/dask/distributed/issues/3734
- [ ] `test_AllProgress`
- [ ] `test_target_duration`
- [ ] `test_submit_different_names` https://github.com/dask/distributed/pull/5916 https://github.com/dask/distributed/issues/5915

More than 2 weeks stable
- [ ] `test_avoid_paused_workers` https://github.com/dask/distributed/issues/5613
- [ ] `test_aliases_2` https://github.com/dask/distributed/issues/5516
- [ ] `test_reschedule_concurrent_requests_deadlock` https://github.com/dask/distributed/issues/5494

GPU
- [ ] `test_ucx_protocol[1234]` https://github.com/dask/distributed/issues/5542
- [ ] `test_gpu_monitoring_recent` https://github.com/dask/distributed/issues/5287
- [ ] `test_secede_rejoin_busy` https://github.com/dask/distributed/issues/5275
- [ ] `test_ucx_config_w_env_var` https://github.com/dask/distributed/issues/5229

Unknown
- [ ] https://github.com/dask/distributed/issues/4742
- [ ] https://github.com/dask/distributed/issues/4583
- [ ] https://github.com/dask/distributed/issues/4543
- [ ] https://github.com/dask/distributed/issues/2129
- [ ] https://github.com/dask/distributed/issues/1597