ClassCastException when using a complex input collection

### Which packages are impacted by your issue?

@graphql-codegen/java

### Describe the bug

When generating an non-scalar, complex input value fetching it with the getter fails with the following error:

```
Exception while fetching data (/planConnection) : class java.util.LinkedHashMap cannot be cast to class org.opentripplanner.apis.gtfs.generated.GraphQLTypes$GraphQLPlanFilterInput (java.util.LinkedHashMap is in module java.base of loader 'bootstrap'; org.opentripplanner.apis.gtfs.generated.GraphQLTypes$GraphQLPlanFilterInput is in unnamed module of loader 'app')
java.lang.ClassCastException: class java.util.LinkedHashMap cannot be cast to class org.opentripplanner.apis.gtfs.generated.GraphQLTypes$GraphQLPlanFilterInput (java.util.LinkedHashMap is in module java.base of loader 'bootstrap'; org.opentripplanner.apis.gtfs.generated.GraphQLTypes$GraphQLPlanFilterInput is in unnamed module of loader 'app')
```

### Your Example Website or App

https://github.com/opentripplanner/OpenTripPlanner/

### Steps to Reproduce the Bug or Issue

1. Generate complex input type
2. Use getter
3. See stacktrace

### Expected behavior

The proper collection input type should be returned.

### Screenshots or Videos

_No response_

### Platform

- OS: Linux
- NodeJS: 222
- `graphql` version: [e.g. 16.3.0]
- `@graphql-codegen/*` version(s): [e.g. 2.6.2]

### Codegen Config File

_No response_

### Additional context

_No response_