Avoid error log "ZeroCollators" when running cargo test #2374

Job	Run time
set-tags	4s
cargo-clippy	2m 42s
build	13m 23s
check-copyright	3s
cargo-toml-feature-propagation	2m 58s
typescript-formatting	19s
toml-formatting	1m 1s
typescript-linting	20s
rust-test	8m 39s
docker-tanssi (tanssi)	51s
check-api-augment	1m 6s
docker-tanssi (container-chain-simple-template)	56s
chopsticks-upgrade-test (stagenet_dancebox, dancebox)	54s
docker-tanssi (container-chain-evm-template)	37s
typescript-tests	6m 28s
typescript-dancebox-specs	28s
chopsticks-upgrade-test (flashbox, flashbox)	38s
typescript-tests-flashbox	2m 57s
chopsticks-upgrade-test (dancebox, dancebox)	44s
chopsticks-upgrade-test (frontier_template, container-chain-template-frontier)	44s
typescript-tests-frontier	4m 36s
typescript-tests-simple-template	2m 18s
zombienet-tests	11m 25s
zombienet-tests-rotation	8m 12s
zombienet-tests-warp-sync	6m 54s
zombienet-test-upgrade (dancebox)	3m 43s
	1h 23m 0s

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