Do not upload all pub packages into the zip bundle (#61488)

Remove git dependencies from pub-cache

#61487

dev/bots/prepare_package.dart

@@ -370,6 +370,12 @@ class ArchiveCreator {
     await _runGit(<String>['clean', '-f', '-X', '**/.packages']);
     /// Remove package_config files and any contents in .dart_tool
     await _runGit(<String>['clean', '-f', '-X', '**/.dart_tool']);
+    /// Remove git subfolder from .pub-cache, this contains the flutter goldens
+    /// and new flutter_gallery.
+    final Directory gitCache = Directory(path.join(flutterRoot.absolute.path, '.pub-cache', 'git'));
+    if (gitCache.existsSync()) {
+      gitCache.deleteSync(recursive: true);
+    }
   }
 
   /// Write the archive to the given output file.