nixos/systemd-stage-1: Use an own systemd package

We need more features than systemdMinimal but less than systemd so we
need some own packages :/

nixos/modules/system/boot/systemd/initrd.nix

@@ -150,7 +150,7 @@ in {
     '';
 
     package = (mkPackageOption pkgs "systemd" {
-      default = "systemdMinimal";
+      default = "systemdStage1";
     }) // {
       visible = false;
     };

pkgs/top-level/all-packages.nix

@@ -23370,6 +23370,17 @@ with pkgs;
     libfido2 = null;
     p11-kit = null;
   };
+  systemdStage1 = systemdMinimal.override {
+    pname = "systemd-stage-1";
+    withCryptsetup = true;
+    withFido2 = true;
+    withTpm2Tss = true;
+    inherit lvm2 libfido2 p11-kit;
+  };
+  systemdStage1Network = systemdStage1.override {
+    pname = "systemd-stage-1-network";
+    withNetworkd = true;
+  };
 
 
   udev = systemd; # TODO: change to systemdMinimal