FBFlutterViewContainer放在UITabBarController中不能及时释放

## Steps to Reproduce
**A small application to reproduce the bug(最小化可复现的demo)**

1. 将FBFlutterViewContainer1放入UITabBarController
2. setViewControllers将UITabBarController放navigationController中
3. 通过navigationController.setViewControllers设置新的FBFlutterViewContainer2
4.UITabBarController会释放，但是FBFlutterViewContainer1不会释放
5.只能手动notifyWillDealloc将FBFlutterViewContainer1释放

**Flutter Boost Version**
v3.0-null-safety-preview.16
**Target Platform:**
iOS
**Target OS version/browser:**
iOS15
**Devices:**
iPhone 13 Pro Max

## Logs
add your crash log or something else.

```
[✓] Flutter (Channel stable, 2.5.3, on macOS 12.2.1 21D62 darwin-x64, locale
zh-Hans-CN)
• Flutter version 2.5.3 at /Users/user/Documents/flutter
• Upstream repository https://github.com/flutter/flutter.git
• Framework revision 18116933e7 (6 months ago), 2021-10-15 10:46:35 -0700
• Engine revision d3ea636dc5
• Dart version 2.14.4
• Pub download mirror https://pub.flutter-io.cn
• Flutter download mirror https://storage.flutter-io.cn

[✓] Android toolchain - develop for Android devices (Android SDK version 31.0.0)
• Android SDK at /Users/user/Library/Android/sdk
• Platform android-31, build-tools 31.0.0
• Java binary at: /Applications/Android
Studio.app/Contents/jre/jdk/Contents/Home/bin/java
• Java version OpenJDK Runtime Environment (build 11.0.8+10-b944.6916264)
• All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS
• Xcode at /Applications/Xcode.app/Contents/Developer
• Xcode 13.3, Build version 13E113
• CocoaPods version 1.11.2

[✓] Chrome - develop for the web
• Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 4.2)
• Android Studio at /Applications/Android Studio.app/Contents
• Flutter plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/9212-flutter
• Dart plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/6351-dart
• Java version OpenJDK Runtime Environment (build 11.0.8+10-b944.6916264)

[✓] VS Code (version 1.65.2)
• VS Code at /Applications/Visual Studio Code.app/Contents
• Flutter extension version 3.36.0

[✓] Connected device (3 available)
• iPhone (mobile) • 577ccf89c9195606ae9bde6085179a3cbad6b458 •
ios • iOS 15.3.1 19D52
• iPhone 13 Pro Max (mobile) • 526E7432-41A7-4646-8484-CB3DC50A8A44 •
ios • com.apple.CoreSimulator.SimRuntime.iOS-15-4 (simulator)
• Chrome (web) • chrome •
web-javascript • Google Chrome 99.0.4844.84

```

Start by reproducing the listed iOS navigation sequence with FBFlutterViewContainer, UITabBarController, and navigationController on iOS 15. Trace why FBFlutterViewContainer1 remains alive after the tab controller is released; done means it is released without manually calling notifyWillDealloc.

Written by the indexing model from the issue text.