C# generaic usage can cause Duplicate Key Exception when performing Assembly Reloading

[Delsin-Yu]

Tested versions

Reproduced in v4.3.dev.mono.custom_build [10e1114]

System information

Godot v4.3.dev.mono (10e1114) - Windows 10.0.19044 - Vulkan (Forward+) - dedicated NVIDIA GeForce RTX 3060 Laptop GPU (NVIDIA; 31.0.15.2802) - AMD Ryzen 9 5900HS with Radeon Graphics (16 Threads)

Issue description

It turns out that there is more to discover in addressing #79519 since this more complex MRP is still causing identical issues.

Steps to reproduce

• Build the GodotEngine on commit 10e1114 with the Mono module enabled according to the Build from source Godot documentation.
• Open the MRP.
• Open every scene inside this project (optional, at least open main_panel).
• Execute a clean dotnet project build (that is, a build process that actually executes and triggers Editor ALC reload without reusing existing MSBuild cache, you can achieve this by editing any code inside the project).
• Based on the scenes you opened, you will get an arbitrary amount of duplicate key exceptions
• Execute another build that triggers ALC reloading will causing .NET: Failed to unload assemblies. Please check <this issue> for more information. #78513.

Unloading assembly load context...
Assembly load context unloaded successfully.
ERROR: System.ArgumentException: An item with the same key has already been added. Key: DEYU.UI.ListControl.ListItemComponent`1[System.Int32]
   at System.Collections.Generic.Dictionary`2.TryInsert(TKey key, TValue value, InsertionBehavior behavior)
   at System.Collections.Generic.Dictionary`2.Add(TKey key, TValue value)
   at Godot.Bridge.ScriptManagerBridge.ScriptTypeBiMap.Add(IntPtr scriptPtr, Type scriptType) in D:\Repos\godot\modules\mono\glue\GodotSharp\GodotSharp\Core\Bridge\ScriptManagerBridge.types.cs:line 23
   at Godot.Bridge.ScriptManagerBridge.TryReloadRegisteredScriptWithClass(IntPtr scriptPtr) in D:\Repos\godot\modules\mono\glue\GodotSharp\GodotSharp\Core\Bridge\ScriptManagerBridge.cs:line 594
   at: void Godot.NativeInterop.ExceptionUtils.LogException(System.Exception) (D:/Repos/godot/modules/mono/glue/GodotSharp/GodotSharp/Core/NativeInterop/ExceptionUtils.cs:113)

Minimal reproduction project (MRP)

minimal.zip