syz-verifier: refactor fuzzingLoop into smaller helper functions #15

Job	Run time
dashboard	1s
aux	4m 45s
race	1s
race_dashboard	1d 0h 0m 1s
build	1s
gvisor	4m 1s
old	7m 15s
arch (presubmit_arch_netbsd)	3m 49s
arch (presubmit_arch_executor)	3m 31s
arch (presubmit_arch_darwin)	3m 57s
arch (presubmit_arch_windows)	3m 42s
arch (presubmit_arch_linux)	10m 48s
arch (presubmit_arch_freebsd)	6m 31s
arch (presubmit_arch_openbsd)	3m 55s
	1d 0h 52m 18s

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