Implicit "required" not applied to FromQuery parameters in Microsoft.AspNetCore.OpenAPI

### Is there an existing issue for this?

- [x] I have searched the existing issues

### Describe the bug

In a controller-based API project, having a `[FromQuery] MyClass request` parameter on a method will not have it's parameters labelled as `"required": true` in the generated OpenAPI Schema - even though it will fail model validation if that parameter is not required.

```cs
[ApiController]
[Route("[controller]")]
public class MyController : ControllerBase
{
[HttpGet]
public IActionResult Get([FromQuery] MyClass request)
{
// ...
}
}

public class MyClass {
public required string City { get; init: ]
}
```

### Expected Behavior

Parameters in an OpenAPI Schema should have `"required": true` when they are required in model binding.

### Steps To Reproduce

https://github.com/sohcah/openapi-parameter-bug
Information in the README.md

### Exceptions (if any)

_No response_

### .NET Version

10.0.100-rc.1.25451.107

### Anything else?

_No response_