[Feature Request] Implement IEquatable<T> on OrtTensorTypeAndShapeInfo

### Describe the feature request

it would be useful in some scenarios that `OrtTensorTypeAndShapeInfo` implements `IEquatable` and associated `GetHashCode` to compare instances

```c#
struct OrtTensorTypeAndShapeInfo : IEquatable
{
...
}
```

### Describe scenario use case

I've found myself in a situation in which I have, I am using a Dictionary where the lambda is a specific funcion that knows how to operate on a tensor of that specific type and shape.

Unfortunately, because the OrtTensorTypeAndShapeInfo has a Shape array, the default equality is comparing the instances of the arrays and not the contents of the shape arrays.

implementing IEquality would fix that.

Locate OrtTensorTypeAndShapeInfo in the C# bindings and inspect how its Shape array is represented and how related tests are organized. Implement equality and hashing so instances with equivalent tensor shapes compare consistently, then verify that they work correctly as Dictionary keys.

Written by the indexing model from the issue text.