fix: Make onboarding a bit more robust when coordinator is down #6353

Job	Run time
10101 node tests	6m 41s
formatting-dprint	19s
generate-ffi	2m 54s
lint-commits	4s
e2e_tests_prepare	9m 6s
Format and lint Flutter code	46s
payout-curve	4m 41s
clippy	4m 17s
unit-tests	8m 32s
e2e-tests (./target/debug/deps/e2e_basic-1a8e93bed48b301a)	4m 48s
e2e-tests (./target/debug/deps/e2e_close_position-fe7288972d02833f)	6m 17s
e2e-tests (./target/debug/deps/e2e_collaborative_close_channel-f8a5a7ab7ef4bed3)	5m 47s
e2e-tests (./target/debug/deps/e2e_collaborative_revert-cab83a768d91a940)	5m 56s
e2e-tests (./target/debug/deps/e2e_force_close_position-88bd1a863778a3f7)	5m 38s
e2e-tests (./target/debug/deps/e2e_force_close_settled_channel-bd993f9137631fa8)	5m 53s
e2e-tests (./target/debug/deps/e2e_open_position-e2f208a74698c7c8)	5m 36s
e2e-tests (./target/debug/deps/e2e_open_position_small_utxos-ed645e43795c263d)	5m 28s
e2e-tests (./target/debug/deps/e2e_open_position_with_external_funding-bcdab6541eaf4d9f)	5m 17s
e2e-tests (./target/debug/deps/e2e_reject_offer-92fd09de067867c2)	5m 16s
e2e-tests (./target/debug/deps/e2e_resize_position-3d43edd8eda732e4)	6m 57s
e2e-tests (./target/debug/deps/e2e_restore_from_backup-cc36740cbae94865)	5m 29s
e2e-tests (./target/debug/deps/e2e_rollover_position-8d2b72956de38f7e)	6m 12s
e2e_tests_check	1s
	1h 51m 55s

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