syz-cluster: enable KMSAN fuzzing track for net patches #18155

Job	Run time
build	4m 8s
aux	4m 45s
race	9m 46s
race_dashboard	3m 27s
gvisor	3m 57s
old	7m 20s
dashboard	2m 5s
arch (presubmit_arch_freebsd)	6m 14s
arch (presubmit_arch_windows)	3m 21s
arch (presubmit_arch_netbsd)	3m 46s
arch (presubmit_arch_openbsd)	3m 42s
arch (presubmit_arch_executor)	3m 17s
arch (presubmit_arch_linux)	10m 44s
arch (presubmit_arch_darwin)	3m 39s
	1h 10m 11s

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