vscode: disable ripgrep patching on macOS

useVSCodeRipgrep = false interferes with macOS 13's notarization enforcement
and doesn't allow the app to start. Setting it to stdenv.isDarwin by default
fixes the package for general use while preserving the option to patch ripgrep
on older versions of macOS if required by someone's particular use case.

pkgs/applications/editors/vscode/vscode.nix

@@ -1,7 +1,7 @@
 { stdenv, lib, callPackage, fetchurl
 , isInsiders ? false
 , commandLineArgs ? ""
-, useVSCodeRipgrep ? false
+, useVSCodeRipgrep ? stdenv.isDarwin
 }:
 
 let

pkgs/applications/editors/vscode/vscodium.nix

@@ -1,4 +1,4 @@
-{ lib, stdenv, callPackage, fetchurl, nixosTests, commandLineArgs ? "", useVSCodeRipgrep ? false }:
+{ lib, stdenv, callPackage, fetchurl, nixosTests, commandLineArgs ? "", useVSCodeRipgrep ? stdenv.isDarwin }:
 
 let
   inherit (stdenv.hostPlatform) system;