kapp: init at 0.34.0

Added kapp at 0.34.0 which is currently missing in nixpkgs

pkgs/tools/networking/kapp/default.nix

@@ -0,0 +1,23 @@
+{ lib, buildGoModule, fetchFromGitHub }:
+buildGoModule rec {
+  pname = "kapp";
+  version = "0.34.0";
+
+  src = fetchFromGitHub {
+    owner = "vmware-tanzu";
+    repo = "carvel-kapp";
+    rev = "v${version}";
+    sha256 = "145909cbq4yb25r6ccpdhzfwk60q5g2hw6qdp2h6ja1ckrnvffld";
+  };
+
+  vendorSha256 = null;
+
+  subPackages = [ "cmd/kapp" ];
+
+  meta = with lib; {
+    description = "CLI tool that encourages Kubernetes users to manage bulk resources with an application abstraction for grouping";
+    homepage = "https://get-kapp.io";
+    license = licenses.asl20;
+    maintainers = with maintainers; [ brodes ];
+  };
+}

pkgs/top-level/all-packages.nix

@@ -5254,6 +5254,8 @@ in
 
   lvmsync = callPackage ../tools/backup/lvmsync { };
 
+  kapp = callPackage ../tools/networking/kapp {};
+
   kdbg = libsForQt5.callPackage ../development/tools/misc/kdbg { };
 
   kippo = callPackage ../servers/kippo { };