Revert "Turn on win_build_tests_2_3 shard, skip 'build windows' tests (#82386)" (#82396)

This reverts commit a66e5a7f.

dev/bots/test.dart

@@ -442,7 +442,8 @@ Future<void> _runExampleProjectBuildTests(FileSystemEntity exampleDirectory) asy
   }
   if (Platform.isWindows) {
     if (Directory(path.join(examplePath, 'windows')).existsSync()) {
-      // TODO(jmagman): Re-add Windows build tests when Visual Studio is available https://github.com/flutter/flutter/issues/81956.
+      await _flutterBuildWin32(examplePath, release: false, additionalArgs: additionalArgs, verifyCaching: verifyCaching);
+      await _flutterBuildWin32(examplePath, release: true, additionalArgs: additionalArgs, verifyCaching: verifyCaching);
     } else {
       print('Example project ${path.basename(examplePath)} has no windows directory, skipping Win32');
     }
@@ -506,6 +507,21 @@ Future<void> _flutterBuildMacOS(String relativePathToApplication, {
   );
 }
 
+Future<void> _flutterBuildWin32(String relativePathToApplication, {
+  @required bool release,
+  bool verifyCaching = false,
+  List<String> additionalArgs = const <String>[],
+}) async {
+  assert(Platform.isWindows);
+  await runCommand(flutter, <String>['config', '--enable-windows-desktop']);
+  print('${green}Testing Windows build$reset for $cyan$relativePathToApplication$reset...');
+  await _flutterBuild(relativePathToApplication, 'Windows', 'windows',
+    release: release,
+    verifyCaching: verifyCaching,
+    additionalArgs: additionalArgs
+  );
+}
+
 Future<void> _flutterBuild(
   String relativePathToApplication,
   String platformLabel,

dev/try_builders.json

@@ -579,7 +579,7 @@
       "name": "Windows build_tests_2_3",
       "repo": "flutter",
       "task_name": "win_build_tests_2_3",
-      "enabled": true
+      "enabled": false
     },
     {
       "name": "Windows build_tests_3_3",