Improve type formatting for C# nested types with generic parameters

**Is your feature request related to a problem? Please describe.**

`FSharpType.Format` for a C#-defined nested type is incorrect when the parent type contains a generic parameter.

The type annotation for `builder` in the following code:

```fsharp
open System.Collections.Immutable

let builder = ImmutableArray.CreateBuilder()
```

is ``val builder: ImmutableArray`1.Builder``, when it more accurately should be `ImmutableArray.Builder` to reflect the layout of the type declarations and the relationship between the parent and child.

**Describe the solution you'd like**

Generic parameters on parent types to be filled in at the point of declaration (`` `1 ``) instead of at the end of the child type.

**Describe alternatives you've considered**

Custom logic to detect this scenario and render the types manually.

**Additional context**

This is using FCS 41.0.3