test_storage_controller_node_deletion is flaky

[erikgrinaker]

https://neonprod.grafana.net/d/fddp4rvg7k2dcf/regression-test-failures?orgId=1&var-test_name=test_storage_controller_node_deletion%5BFalse%5D&from=now-7d&to=now&timezone=utc&var-restrict=true&var-max_count=100&var-reference=$__all&var-ignore_reference=refs%2Fpull%2F0000%2Fmerge

RuntimeError: Run ['/tmp/neon/bin/neon_local', 'tenant', 'create', '--tenant-id', '4060912a5e488e9fa6641510266e02ee', '--timeline-id', '5fd1fbce19868b6f9c932f2d2c61430d', '--pg-version', '14', '--shard-count', '8', '--placement-policy', '{"Attached":1}'] failed:
  stdout:
    tenant 4060912a5e488e9fa6641510266e02ee successfully created on the pageserver
  stderr:
    command failed: pageserver API: Tenant attachment changed, please retry

[skyzh]

it starts to be flaky since 01-14 06:29

[skyzh]

likely related to the AZ changes before that night #9916