even more AI changes #19022

Job	Run time
build	3m 34s
race	8m 56s
old	7m 15s
aux	4m 9s
gvisor	4m 21s
dashboard	2m 14s
race_dashboard	3m 37s
arch (presubmit_arch_executor)	3m 20s
arch (presubmit_arch_netbsd)	4m 6s
arch (presubmit_arch_linux)	10m 53s
arch (presubmit_arch_darwin)	3m 30s
arch (presubmit_arch_openbsd)	3m 27s
arch (presubmit_arch_windows)	3m 43s
arch (presubmit_arch_freebsd)	5m 58s
	1h 9m 3s

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