Token: removed test-only `stringifyList()` overload #19280

Job	Run time
build_make (ubuntu:24.04)	3m 51s
build_make (alpine:3.23)	6m 6s
build_cmake (ubuntu:24.04, true, true)	4m 57s
build_cmake (alpine:3.23, false, false)	4m 37s
build_make (ubuntu:25.10)	4m 21s
build_cmake (ubuntu:25.10, true, true)	4m 42s
	28m 34s

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