syz-cluster: initial code #14944

Job	Run time
aux	1m 55s
arch (presubmit_arch_linux)	1m 52s
build	23s
dashboard	24s
gvisor	1m 25s
arch (presubmit_arch_freebsd)	1m 52s
old	39s
race	25s
arch (presubmit_arch_netbsd)	1m 50s
race_dashboard	22s
arch (presubmit_arch_openbsd)	1m 50s
arch (presubmit_arch_darwin)	1m 49s
arch (presubmit_arch_windows)	1m 50s
arch (presubmit_arch_executor)	1m 51s
	18m 27s

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