Make copy-constructible classes copyable #20266

Job	Run time
build_make (ubuntu:25.10)	4m 37s
build_cmake (ubuntu:24.04, true, true)	5m 12s
build_cmake (alpine:3.23, false, false)	4m 38s
build_cmake (ubuntu:25.10, true, true)	5m 39s
build_make (alpine:3.23)	6m 0s
build_make (ubuntu:24.04)	4m 43s
	30m 49s

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