Instrumentation for delayed UB stemming from uninitialized memory #7475

Job	Run time
perf	34m 25s
documentation	1m 59s
benchcomp-tests	4m 26s
write-json-symtab-regression	17m 56s
regression (macos-13)	29m 44s
regression (ubuntu-20.04)	27m 9s
regression (ubuntu-22.04)	32m 20s
regression (macos-14)	21m 17s
	2h 49m 16s

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