Fix #12548 FN returnTempReference with braced initializer (regressio… #19331

Job	Run time
build_make (ubuntu:25.10)	4m 52s
build_cmake (ubuntu:24.04, true, true)	5m 42s
build_cmake (ubuntu:25.10, true, true)	5m 20s
build_make (alpine:3.23)	6m 9s
build_cmake (alpine:3.23, false, false)	4m 26s
build_make (ubuntu:24.04)	4m 25s
	30m 54s

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