all: disable dupl linter for tests #18578

Job	Run time
race_dashboard	2m 42s
race	7m 1s
build	3m 29s
old	7m 7s
dashboard	2m 2s
gvisor	4m 3s
aux	4m 7s
arch (presubmit_arch_darwin)	3m 23s
arch (presubmit_arch_netbsd)	3m 56s
arch (presubmit_arch_openbsd)	3m 53s
arch (presubmit_arch_windows)	3m 37s
arch (presubmit_arch_freebsd)	6m 33s
arch (presubmit_arch_executor)	3m 14s
arch (presubmit_arch_linux)	10m 45s
	1h 5m 52s

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