Complement `TestPartialStateJoin/Resync_completes_even_when_events_arrive_before_their_prev_events` is flaky
https://github.com/matrix-org/synapse/runs/8210456111?check_suite_focus=true
https://github.com/matrix-org/synapse/actions/runs/3053296866/jobs/4923796802
https://github.com/matrix-org/synapse/actions/runs/3088432905/jobs/4994896117#step:5:5413
https://github.com/matrix-org/synapse/actions/runs/3095873937/jobs/5010768636
https://github.com/matrix-org/synapse/actions/runs/3112928754/jobs/5046969046
https://github.com/matrix-org/synapse/actions/runs/3117419509/jobs/5056065355
https://github.com/matrix-org/synapse/actions/runs/3127323400/jobs/5073871313
https://github.com/matrix-org/synapse/actions/runs/3177346451/jobs/5177733776 and https://github.com/matrix-org/synapse/actions/runs/3177346451/jobs/5177733662
https://github.com/matrix-org/synapse/issues/14056 https://github.com/matrix-org/synapse/actions/runs/3188210616
I'm still seeing this: https://github.com/matrix-org/synapse/actions/runs/4024836999/jobs/6917368824
Seen in https://github.com/matrix-org/synapse/actions/runs/4086737084/jobs/7046439993
https://github.com/matrix-org/synapse/actions/runs/4087695072/jobs/7048551656
Saw this flake in https://github.com/matrix-org/synapse/actions/runs/7001673593/job/19044131883