Fix `Move misplaced using directives` breaks symbol qualification

[just-ero]

Version Used

Compiler: 4.13.0-2.24561.3 (24e1dd6)
.NET: 9.0.100
Visual Studio Code: 1.95.3, f1a4fb101478ce6ec82fe9627c43efbf9e98c813, x64
C# Extension: v2.56.31
C# Dev Kit Extension: v1.14.2

Steps to Reproduce

1. Create or open a C# project in Visual Studio Code (Visual Studio untested).
2. Add the following code wherever syntactically applicable:

   namespace Foo;
   
   using Alias = C;
   
   class C;

3. Apply the Move misplaced using directives fix on Alias.

Diagnostic ID: IDE0065

Expected Behavior

using Alias = Foo.C;

namespace Foo;

class C;

Actual Behavior

using Alias = C; // The type or namespace name 'C' could not be found

namespace Foo;
class C;