syz-cluster: use base-commit hint from patch series for triage #18629

Job	Run time
race_dashboard	3m 1s
dashboard	2m 8s
arch (presubmit_arch_windows)	3m 38s
gvisor	3m 57s
arch (presubmit_arch_netbsd)	3m 54s
aux	4m 4s
arch (presubmit_arch_darwin)	3m 55s
build	3m 15s
arch (presubmit_arch_executor)	3m 21s
arch (presubmit_arch_linux)	10m 46s
arch (presubmit_arch_openbsd)	4m 3s
old	7m 2s
race	9m 22s
arch (presubmit_arch_freebsd)	6m 27s
	1h 8m 53s

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