The following tests must be included in backports_required_for_multiversion_tests.yml, pending backport of SERVER-46389 to 4.4:

election_handoff_basic.js
election_candidate_and_participant_metrics.js
no_flapping_during_network_partition.js
election_handoff_flip.js
catchup.js
avg_num_catchup_ops.js
initial_sync_applier_error.js
initial_sync_drop_collection.js
initial_sync_rename_collection.js
initial_sync_test_fixture_test.js

(These tests passed when 4.2 was the last-stable because the checks for changed log lines were guarded behind isJsonLog(), but 4.4 does use JSON logs.)