This commit moves the kernel package version override from the base nixos service to specific system configurations. Now, the latest linux packages will be used only in the system configurations where the override has been explicitly added. This approach gives us more flexibility to handle different kernel package versions for different systems.
In systems/x86_64-linux/x1/default.nix, 'docker' has been added to user.extraGroups. This allows the current user to manage Docker without needing root access.
This commit introduces virtualization configurations for docker and libvirtd in the x86_64-linux system. It also sets the podman.dockerCompat to false to avoid compatibility issues.
