Fix #14888 FP functionConst with array to pointer decay #20232

Job	Run time
build_cmake (ubuntu:24.04, true, true)	3m 27s
build_cmake (ubuntu:25.10, true, true)	5m 26s
build_cmake (alpine:3.23, false, false)	4m 35s
build_make (alpine:3.23)	4m 44s
build_make (ubuntu:24.04)	3m 44s
build_make (ubuntu:25.10)	3m 15s
	25m 11s

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