Use fsck to detect corrupt file systems in reproducers #14555

Job	Run time
build	12m 22s
aux	4m 49s
arch (presubmit_arch_linux)	10m 38s
dashboard	5m 19s
arch (presubmit_arch_freebsd)	6m 29s
gvisor	4m 5s
arch (presubmit_arch_netbsd)	4m 19s
old	6m 34s
arch (presubmit_arch_openbsd)	4m 29s
race	10m 45s
arch (presubmit_arch_darwin)	4m 15s
race_dashboard	7m 18s
arch (presubmit_arch_windows)	3m 22s
arch (presubmit_arch_executor)	3m 28s
	1h 28m 12s

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