Fix a flaky zombienet test - 0004-coretime-smoke-test #4214

Job	Run time
preflight / preflight	46s
preflight / ci-versions	1m 19s
test-frame-ui	46m 9s
test-full-crypto-feature	2m 42s
cargo-check-benches (master)	20m 33s
cargo-check-benches (current)	20m 16s
test-node-metrics	8m 20s
cargo-check-each-crate (1)	18m 41s
cargo-check-all-crate-macos	11m 33s
cargo-check-each-crate (2)	19m 19s
cargo-check-each-crate (3)	7m 0s
cargo-check-each-crate (4)	16m 54s
cargo-check-each-crate (5)	23m 36s
cargo-check-each-crate (6)	14m 48s
cargo-check-each-crate (7)	29m 59s
test-frame-examples-compile-to-wasm	3m 5s
check-tracing	2m 21s
test-deterministic-wasm	6m 23s
check-metadata-hash	6m 20s
node-bench-regression-guard	19s
All test misc tests passed	1s
	4h 20m 24s

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