Make copy-constructible classes copyable #20268

Job	Run time
build_cmake (alpine:3.23, false, false)	4m 49s
build_make (ubuntu:24.04)	2m 57s
build_make (ubuntu:25.10)	3m 38s
build_cmake (ubuntu:25.10, true, true)	2m 45s
build_make (alpine:3.23)	5m 13s
build_cmake (ubuntu:24.04, true, true)	2m 48s
	22m 10s

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