Fix #14891 FP knownConditionTrueFalse (dereferencing pointer to array member) #20337

Job	Run time
build_cmake (ubuntu:25.10, true, true)	26m 46s
build_cmake (ubuntu:24.04, true, true)	26m 46s
build_cmake (alpine:3.23, false, false)	26m 46s
build_make (ubuntu:25.10)	26m 46s
build_make (alpine:3.23)	26m 46s
build_make (ubuntu:24.04)	26m 46s
	2h 40m 36s

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