google-maps: GMapView.camera throws Fatal error: Unexpectedly found nil

## Bug Report

### Plugin(s)
```
"@capacitor/google-maps": "^5.4.1"
```

### Capacitor Version

```
💊 Capacitor Doctor 💊

Latest Dependencies:

@capacitor/cli: 6.0.0
@capacitor/core: 6.0.0
@capacitor/android: 6.0.0
@capacitor/ios: 6.0.0

Installed Dependencies:

@capacitor/android: not installed
@capacitor/cli: 5.0.4
@capacitor/ios: 5.0.4
@capacitor/core: 5.7.0
```

### Platform(s)
IOS
- IOS 15, Iphone SE (1) Emulator
- IOS 14, Iphone SE (1) real device

### Current Behavior
The app crashes when map sets camera after the map is created. Error is thrown from google maps plugin.
Also with other methods of the plugin the error is thrown:
eg.:
- enableClustering

I haven't tested all methods.

### Expected Behavior
App should not crash

### Code Reproduction
[Archive.zip](https://github.com/ionic-team/capacitor-plugins/files/15447862/Archive.zip)

- ionic cap add ios
- npm install
- add google API key to google-maps component file src/app/core/map/components/google-map/google-map.component.ts
- ionic capacitor build ios
- open xcode
- download ios 15
- create emulator SE(1) with IOS 15
- run app
-
or

- run against an older iPhone

### Additional context:

- Should be same issue like here: https://github.com/ionic-team/capacitor-plugins/issues/1760

I did some further debugging and found out that it may be related to this issue: https://github.com/ionic-team/capacitor-google-maps/issues/108, where the map is not properly created and any operation will crash the app since there is no `mapViewController`.

With some of the comments on the other issue, I could partly create the map and the camera is working now. So I believe that the plugin fails to create the `GMapView ` so that it is nil.