Generate dSYM files during iOS archive (#73630)

dev/devicelab/bin/tasks/ios_content_validation_test.dart

@@ -20,14 +20,24 @@ Future<void> main() async {
           ]);
         });
 
-        checkDirectoryExists(path.join(
+        final String archivePath = path.join(
           flutterProject.rootPath,
           'build',
           'ios',
           'archive',
           'Runner.xcarchive',
+        );
+
+        checkDirectoryExists(path.join(
+          archivePath,
           'Products',
         ));
+
+        checkDirectoryExists(path.join(
+          archivePath,
+          'dSYMs',
+          'Runner.app.dSYM',
+        ));
       });
 
       return TaskResult.success(null);

packages/flutter_tools/lib/src/ios/mac.dart

@@ -223,7 +223,8 @@ Future<XcodeBuildResult> buildXcodeProject({
       buildCommands.addAll(<String>[
         '-workspace', globals.fs.path.basename(entity.path),
         '-scheme', scheme,
-        'BUILD_DIR=${globals.fs.path.absolute(getIosBuildDirectory())}',
+        if (buildAction != XcodeBuildAction.archive) // dSYM files aren't copied to the archive if BUILD_DIR is set.
+          'BUILD_DIR=${globals.fs.path.absolute(getIosBuildDirectory())}',
       ]);
       break;
     }

packages/flutter_tools/test/commands.shard/hermetic/build_ipa_test.dart

@@ -92,7 +92,6 @@ void main() {
           '-quiet',
         '-workspace', 'Runner.xcworkspace',
         '-scheme', 'Runner',
-        'BUILD_DIR=/build/ios',
         '-sdk', 'iphoneos',
         'FLUTTER_SUPPRESS_ANALYTICS=true',
         'COMPILER_INDEX_STORE_ENABLE=NO',