Fix #14634: Inconsistent AST for array declarations #20379

Job	Run time
build_make (ubuntu:25.10)	3m 28s
build_cmake (ubuntu:25.10, true, true)	5m 14s
build_cmake (alpine:3.23, false, false)	4m 36s
build_make (alpine:3.23)	3m 6s
build_make (ubuntu:24.04)	3m 23s
build_cmake (ubuntu:24.04, true, true)	3m 6s
	22m 53s

Provide feedback