[pallet-broker] Fix auto renew benchmarks #16462

Job	Run time
preflight / preflight	43s
preflight / ci-versions	1m 14s
test-linux-stable-int	7m 37s
test-linux-stable-runtime-benchmarks	24m 3s
test-linux-stable-no-try-runtime (1/2)	31m 23s
test-linux-stable (1/3, parity-large)	34m 36s
test-linux-stable-no-try-runtime (2/2)	19m 41s
test-linux-stable (1/3, parity-oldlinux)	31m 11s
test-linux-stable (2/3, parity-large)	19m 22s
test-linux-stable (2/3, parity-oldlinux)	17m 8s
test-linux-stable (3/3, parity-large)	20m 51s
test-linux-stable (3/3, parity-oldlinux)	17m 13s
All tests passed	1s
	3h 45m 3s

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