fix: make discv5 test deterministic #5491

Job	Run time
setup / start-builder	1m 2s
setup / setup	30s
build	9m 22s
yarn-project-formatting	8m 31s
bb-native-tests	13s
yarn-project-test	7m 52s
bb-bench-binaries	13s
setup-bench / start-builder	1m 5s
setup-bench / setup	17s
bb-bench	14s
e2e (e2e-browser)	1m 32s
e2e (e2e-docs-examples)	57s
e2e (e2e-sandbox-example)	1m 43s
e2e (e2e-tests)	9m 51s
e2e (flakey-e2e-tests)	4m 40s
e2e (guides-dapp-testing)	2m 54s
e2e (guides-writing-an-account-contract)	1m 1s
e2e (integration-l1-publisher)	1m 57s
e2e (pxe)	39s
e2e (uniswap-trade-on-l1-from-l2)	5m 56s
merge-check	1s
notify	0s
	1h 0m 30s

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