Switch over to `linux_latest` on decryption, copy over changes to encryption

hosts/decryption/default.nix

···
     (flakeRoot + /modules/desktop/environments/gnome.nix)
   ];
 
-  boot.kernelPackages = pkgs.linuxKernel.packages.linux_hardened;
+  boot.kernelPackages = pkgs.linuxPackages_latest;
 
   hardware.nvidia.prime = {
     amdgpuBusId = "PCI:4:0:0";

hosts/encryption/default.nix

···
     (flakeRoot + /modules/common/virtualization.nix)
   ];
 
-  boot.kernelPackages = pkgs.linuxKernel.packages.linux_zen;
+  boot.kernelPackages = pkgs.linuxPackages_zen;
 
   networking.hostName = "encryption";