[firebase_messaging]: Cloud Messaging: flutter firebase background notification not working for iOS (Callbacks not triggering)

### Is there an existing issue for this?

- [x] I have searched the existing issues.

### Which plugins are affected?

_No response_

### Which platforms are affected?

_No response_

### Description

Reopening issue #16878 which was closed by stale bot.

This issue persists.

### Reproducing the issue

See #16878

### Firebase Core version

3.10.1

### Flutter Version

3.27.0

### Relevant Log Output

```shell

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### Flutter dependencies

Expand Flutter dependencies snippet

```yaml

Replace this line with the contents of your `flutter pub deps -- --style=compact`.

```

### Additional context and comments

_No response_