These packages are copied from https://github.com/kubernetes/kubernetes.

The kubernetes main repo does not correctly set the go modules, see bug https://github.com/kubernetes/kubernetes/issues/79384. The workaround we used before was setting replace directives as there "suggested". Since Go 1.18 there is a convenient install command, but it does not allow installation from repos with replace directives. So we had to copy the used modules and placed here. CRI-O and probably the other CRI shims copied/used to copy those modules as well. E.g. https://github.com/cri-o/cri-o/tree/8d4d158935929800c4300b82eb4b5a83ded400f4/server/streaming