Hot Reload: unable to call added public API

### Description

Calling a public method added to a referenced library during Hot Reload may throw `System.MissingMethodException`.

Repro:
Run App.exe, uncomment the commented code and apply changes. If both changes are applied at the same time the exception is thrown. If the method is added first and then the caller is updated it works. Seems like the changes should be applied in topological order based on assembly references.

App.exe:

```C#
class Program
{
static void G()
{
var c = new LibClass();
// Console.WriteLine(c.F()); // uncomment during Hot Reload session
}

static void Main(string[] args)
{
while (true)
{
Thread.Sleep(500);
G();
}
}
}
```

Lib.dll referenced by App.exe

```C#
public class LibClass
{
// uncomment during Hot Reload session
// public int F() => 1;
}
```

### Configuration

.NET 6.0.100-preview.6.21355.2
Windows 10

### Regression?

No.