Make copy-constructible classes copyable #20471

Job	Run time
build_cmake (ubuntu:25.10, true, true)	5m 18s
build_make (ubuntu:24.04)	4m 35s
build_make (ubuntu:25.10)	3m 46s
build_cmake (ubuntu:24.04, true, true)	5m 43s
build_cmake (alpine:3.23, false, false)	4m 42s
build_make (alpine:3.23)	4m 42s
	28m 46s

Provide feedback