split the actual check implementations from the instances #545

Job	Run time
build (ubsan, -DANALYZE_UNDEFINED=On, true, process, true)	49m 29s
build (tsan, -DANALYZE_THREAD=On, false, thread, false, --executor=thread --error-exitcode=0)	13m 12s
build (asan, -DANALYZE_ADDRESS=On, true, process, false)	15m 29s
	1h 18m 10s

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