fix package template create platform folders (#125292)

`package` template should not create platform folders. This happen cause by default all platforms are supported and tools didn't distinguish between package and other template, which makes all platforms are true for below code,
https://github.com/flutter/flutter/blob/d186792c00f61149916f685e2975300342f64749/packages/flutter_tools/lib/src/project.dart#L374-L380

fixes: #119844 which make #116320 makes invalid. As for why tools created deprecated `Android Embedding`, `appManifestFile` does not exist for `package` template, which make below code to trigger,
https://github.com/flutter/flutter/blob/master/packages/flutter_tools/lib/src/project.dart#L768-L770

This does not happen with `module` and `plugin` as it have specific condition check for them. I try to reproduce it with `app` template but didn't succeed

packages/flutter_tools/lib/src/commands/create.dart

@@ -267,6 +267,14 @@ class CreateCommand extends CreateBase {
       includeLinux = false;
       includeMacos = false;
       includeWindows = false;
+    } else if (template == FlutterProjectType.package) {
+      // The package template does not supports any platform.
+      includeIos = false;
+      includeAndroid = false;
+      includeWeb = false;
+      includeLinux = false;
+      includeMacos = false;
+      includeWindows = false;
     } else {
       includeIos = featureFlags.isIOSEnabled && platforms.contains('ios');
       includeAndroid = featureFlags.isAndroidEnabled && platforms.contains('android');

packages/flutter_tools/test/commands.shard/permeable/create_test.dart

@@ -516,6 +516,7 @@ void main() {
       unexpectedPaths: <String>[
         'android/app/src/main/java/com/example/flutter_project/MainActivity.java',
         'android/src/main/java/com/example/flutter_project/FlutterProjectPlugin.java',
+        'android/app/src/main/java/io/flutter/plugins/GeneratedPluginRegistrant.java',
         'example/android/app/src/main/java/com/example/flutter_project_example/MainActivity.java',
         'example/ios/Runner/AppDelegate.h',
         'example/ios/Runner/AppDelegate.m',
@@ -525,9 +526,18 @@ void main() {
         'ios/Classes/FlutterProjectPlugin.m',
         'ios/Runner/AppDelegate.h',
         'ios/Runner/AppDelegate.m',
+        'ios/Runner/GeneratedPluginRegistrant.h',
+        'ios/Runner/GeneratedPluginRegistrant.m',
         'ios/Runner/main.m',
         'lib/main.dart',
         'test/widget_test.dart',
+        'windows/flutter/generated_plugin_registrant.cc',
+        'windows/flutter/generated_plugin_registrant.h',
+        'windows/flutter/generated_plugins.cmake',
+        'linux/flutter/generated_plugin_registrant.cc',
+        'linux/flutter/generated_plugin_registrant.h',
+        'linux/flutter/generated_plugins.cmake',
+        'macos/Flutter/GeneratedPluginRegistrant.swift',
       ],
     );
     return _runFlutterTest(projectDir);