tools/syz-aflow: enable downloading bugs by ExtID or ID #19126

Job	Run time
race	9m 26s
old	7m 21s
aux	3m 56s
dashboard	1m 59s
build	2m 30s
race_dashboard	3m 54s
arch (presubmit_arch_linux)	10m 55s
arch (presubmit_arch_executor)	3m 21s
arch (presubmit_arch_freebsd)	6m 28s
arch (presubmit_arch_netbsd)	3m 50s
arch (presubmit_arch_darwin)	3m 55s
arch (presubmit_arch_openbsd)	3m 48s
arch (presubmit_arch_windows)	3m 39s
gvisor	4m 10s
	1h 9m 12s

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