checker: fix struct array generic field (fix #22406, second try) (#22… #7218

Job	Run time
tests-sanitize-address-clang	2h 4m 27s
tests-sanitize-address-gcc	2h 30m 15s
tests-sanitize-address-msvc	3m 59s
tests-sanitize-memory-clang	3h 17m 37s
tests-sanitize-undefined-clang	59m 42s
tests-sanitize-undefined-gcc	1h 34m 39s
	10h 30m 39s

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