lens: Change lens' listed license from MIT to their own proprietary license.

Although Lens is based on a free core component ("OpenLens"), the tarballs
provided by Mirantis include a proprietary version of Lens that requires
a subscription.

As the proprietary option offers additional features, it would not be wise
to simply rewrite the derivation and base it on the FOSS source code.
Instead, implementing a new derivation for OpenLens is likely the better
approach.

lib/licenses.nix

@@ -618,6 +618,12 @@ in mkLicense lset) ({
     fullName = "Licence Art Libre 1.3";
   };
 
+  lens = {
+    fullName = "Lens Terms of Service Agreement";
+    url = "https://k8slens.dev/licenses/tos";
+    free = false;
+  };
+
   lgpl2Only = {
     spdxId = "LGPL-2.0-only";
     fullName = "GNU Library General Public License v2 only";

pkgs/applications/networking/cluster/lens/darwin.nix

@@ -22,7 +22,7 @@ stdenv.mkDerivation rec {
   meta = with lib; {
     description = "The Kubernetes IDE";
     homepage = "https://k8slens.dev/";
-    license = licenses.mit;
+    license = licenses.lens;
     maintainers = with maintainers; [ dbirks ];
     platforms = [ "aarch64-darwin" ];
   };

pkgs/applications/networking/cluster/lens/linux.nix

@@ -37,7 +37,7 @@ appimageTools.wrapType2 {
   meta = with lib; {
     description = "The Kubernetes IDE";
     homepage = "https://k8slens.dev/";
-    license = licenses.mit;
+    license = licenses.lens;
     maintainers = with maintainers; [ dbirks RossComputerGuy ];
     platforms = [ "x86_64-linux" ];
   };