linux-uvm: start adding overrides

...from spectrum and libkrunfw

profiles/ch-runner.nix

@@ -130,6 +130,7 @@ in
   };
   config = lib.mkMerge [
     {
+      # boot.kernelPackages = pkgs.linuxPackagesFor (uvmsPkgs.linux-uvm);
       uvms.cloud-hypervisor.settings = {
         payload = {
           cmdline = lib.concatStringsSep " " cfg.cmdline;