IntelliSense breaks when hidding sln and csproj files

Type: Bug

## Issue Description ##
When excluding sln and csproj files from Explorer in VSCode the C# intellisense breaks entirely.

This may be by design but wanted to confirm. I'm not aware of the inner workings of VSCode and how files are presented to the C# extension, if they are listed but marked as hidden or are just not exposed at all. The reason I do this is just for clarity, it's obviously not a major issue This issue/feature maybe useful for reference as I spent the best part of a day trying to understand why this was happening. I cant remember having the issue wi

Based on the wording in VSCode:

> Configure glob patterns for excluding files and folders. For example, the File Explorer decides which files and folders to show or hide based on this setting.

I've always taken this to mean hidden and not excluded, though based on this issue I'm guessing the latter is the case.

## Steps to Reproduce ##
- Create a new dotnet console application
- Open in VSCode, all fine, intellisense is working
- Add the following to VSCode use configuration:
```
"files.exclude": {
"**/*.csproj": true,
"**/*.sln": true
}
```
- Close VSCode
- Open console application again
- IntelliSense stopped working

## Expected Behavior ##
IntelliSense functions normally

## Actual Behavior ##
IntelliSense no-longer working

## Logs ##
When not hidding files:
```
Using dotnet configured on PATH
Dotnet path: C:\Program Files\dotnet\dotnet.exe
Activating C# standalone...
waiting for named pipe information from server...
[stdout] {"pipeName":"\\\\.\\pipe\\36def1ce-2e39-408b-a9d3-ca4766c7a3d6"}
received named pipe information from server
attempting to connect client to server...
client has connected to server
[Info - 8:50:37 AM] [Program] Language server initialized
[Info - 8:50:38 AM] [LanguageServerProjectSystem] Successfully completed load of c:\Users\me\Source\Personal\IntellisenseBug\IntellisenseBug.csproj
[Info - 8:50:38 AM] [LanguageServerProjectSystem] Completed (re)load of all projects in 00:00:00.8152196
[Info - 8:50:39 AM] [LanguageServerProjectSystem] Successfully completed load of c:\Users\me\Source\Personal\IntellisenseBug\IntellisenseBug.csproj
[Info - 8:50:39 AM] [LanguageServerProjectSystem] Completed (re)load of all projects in 00:00:00.6529274
[Info - 8:50:56 AM] [LanguageServerProjectSystem] Successfully completed load of c:\Users\me\Source\Personal\IntellisenseBug\IntellisenseBug.csproj
[Info - 8:50:56 AM] [LanguageServerProjectSystem] Completed (re)load of all projects in 00:00:00.6591692
```

When hiding files:
```
Using dotnet configured on PATH
Dotnet path: C:\Program Files\dotnet\dotnet.exe
Activating C# standalone...
waiting for named pipe information from server...
[stdout] {"pipeName":"\\\\.\\pipe\\ab618a39-230c-4f16-a5a5-390ec27445e7"}
received named pipe information from server
attempting to connect client to server...
client has connected to server
[Info - 8:52:43 AM] [Program] Language server initialized
Using dotnet configured on PATH
```

### C# log ###
Post the output from Output-->C# here

### C# LSP Trace Logs ###
Post the output from Output-->C# LSP Trace Logs here. Requires `dotnet.server.trace` to be set to `Trace`

## Environment information ##

**VSCode version**: 1.82.2
**C# Extension**: 2.3.27
**Using OmniSharp**: false

Dotnet Information
.NET SDK:
Version: 7.0.401
Commit: eb26aacfec

Runtime Environment:
OS Name: Windows
OS Version: 10.0.22621
OS Platform: Windows
RID: win10-x64
Base Path: C:\Program Files\dotnet\sdk\7.0.401\

Host:
Version: 7.0.11
Architecture: x64
Commit: ecb34f85ec

.NET SDKs installed:
7.0.401 [C:\Program Files\dotnet\sdk]

.NET runtimes installed:
Microsoft.AspNetCore.App 6.0.22 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 7.0.11 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.NETCore.App 3.1.32 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 6.0.22 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 7.0.11 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.WindowsDesktop.App 3.1.32 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 6.0.22 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 7.0.11 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

Other architectures found:
x86 [C:\Program Files (x86)\dotnet]
registered at [HKLM\SOFTWARE\dotnet\Setup\InstalledVersions\x86\InstallLocation]

Environment variables:
Not set

global.json file:
Not found

Learn more:
https://aka.ms/dotnet/info

Download .NET:
https://aka.ms/dotnet/download

Visual Studio Code Extensions

|Extension|Author|Version|Folder Name|
|---|---|---|---|
|csharp|ms-dotnettools|2.3.27|ms-dotnettools.csharp-2.3.27-win32-x64|
|symbols|miguelsolorio|0.0.14|miguelsolorio.symbols-0.0.14|
|user-secrets|adrianwilczynski|2.0.1|adrianwilczynski.user-secrets-2.0.1|
|vscode-dotnet-runtime|ms-dotnettools|1.8.0|ms-dotnettools.vscode-dotnet-runtime-1.8.0|;

Extension version: 2.3.27
VS Code version: Code 1.82.2 (abd2f3db4bdb28f9e95536dfa84d8479f1eb312d, 2023-09-14T05:55:25.390Z)
OS version: Windows_NT x64 10.0.22621
Modes:

System Info

|Item|Value|
|---|---|
|CPUs|AMD Ryzen 9 7950X3D 16-Core Processor (32 x 4200)|
|GPU Status|2d_canvas: enabled
canvas_oop_rasterization: enabled_on
direct_rendering_display_compositor: disabled_off_ok
gpu_compositing: enabled
multiple_raster_threads: enabled_on
opengl: enabled_on
rasterization: enabled
raw_draw: disabled_off_ok
video_decode: enabled
video_encode: enabled
vulkan: disabled_off
webgl: enabled
webgl2: enabled
webgpu: enabled|
|Load (avg)|undefined|
|Memory (System)|63.14GB (49.03GB free)|
|Process Argv|. --crash-reporter-id d19224b2-86f4-4f4a-90ba-eec055290798|
|Screen Reader|no|
|VM|0%|

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