Fix #14946: `originalName` in dumpfile missing for local typedefs #20510

Job	Run time
build_cmake (ubuntu:25.10, true, true)	3m 8s
build_make (alpine:3.23)	4m 36s
build_cmake (ubuntu:24.04, true, true)	2m 59s
build_make (ubuntu:24.04)	1m 57s
build_cmake (alpine:3.23, false, false)	4m 45s
build_make (ubuntu:25.10)	2m 21s
	19m 46s

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