Make copy-constructible classes copyable #20283

Job	Run time
build_cmake (ubuntu:25.10, true, true)	5m 35s
build_make (ubuntu:25.10)	3m 59s
build_cmake (alpine:3.23, false, false)	4m 48s
build_cmake (ubuntu:24.04, true, true)	5m 22s
build_make (alpine:3.23)	5m 51s
build_make (ubuntu:24.04)	3m 53s
	29m 28s

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