Cannot set generic parent for TypeBuilder using System.Reflection.Metadata.MetadataLoadContext and Reflection.Emit

### Description

In .NET 10.0, combining `System.Reflection.Emit` with `System.Reflection.Metadata.MetadataLoadContext` fails for dynamic type emission involving generics. Specifically, constructing a closed generic type (e.g., `StateMachine`) from metadata and setting it as a parent for a `TypeBuilder `triggers unsupported operations on SignatureType, such as checking `Type.IsInterface`.

### Reproduction Steps

This issue can be reproduced using the minimal project available at [https://github.com/alexander-clearis/EmitGenericMixedContext.git](https://github.com/alexander-clearis/EmitGenericMixedContext.git)

**Project Explanation**:
The repository contains a simple .NET 10.0 solution with two projects:

- **Common**: Defines basic types, including a generic interface `IStateMachine `(empty for repro purposes) and related helpers.

Emitter: The main project that demonstrates the bug. It uses `MetadataLoadContext `(with a custom resolver for core assemblies) to load generics, emits new types via `Reflection.Emit`, and attempts to inherit from a constructed generic (`StateMachine`). The entry point is `Program.cs`, which generates and saves a dynamic assembly ("TestAssembly.dll").

### Expected behavior

`SetParent `and `CreateType` succeed, allowing the new type to inherit from the metadata-loaded generic without exceptions.

### Actual behavior

`NotSupportedException` is thrown due to limitations in `SignatureType `reflection support.

### Regression?

_No response_

### Known Workarounds

_No response_

### Configuration

_No response_

### Other information

_No response_