failed to download .net core debugger

Type: Bug

## Issue Description ##
the c# dev kit apparently requires pre-release version of this extension nowm (https://github.com/microsoft/vscode-dotnettools/issues/2621). so i switched to ms-dotnettools.csharp-2.0.251, and now i get this in the output window:

```
Installing C# dependencies...
Platform: linux, x86_64, name=rocky, version=9.4

Downloading package '.NET Core Debugger (linux / x64)' Failed to download from https://vsdebugger.azureedge.net/coreclr-debug-2-0-2/coreclr-debug-linux-x64.zip. Error code '409')
Failed at stage: downloadPackage
409

[Error - 8:07:11 PM] Microsoft.CodeAnalysis.LanguageServer client: couldn't create connection to server.
```

trying myself:
```
$ wget https://vsdebugger.azureedge.net/coreclr-debug-2-0-2/coreclr-debug-linux-x64.zip
--2025-12-16 20:07:35-- https://vsdebugger.azureedge.net/coreclr-debug-2-0-2/coreclr-debug-linux-x64.zip
Resolving vsdebugger.azureedge.net (vsdebugger.azureedge.net)... 2620:1ec:bdf::66, 2620:1ec:46::66, 13.107.246.66, ...
Connecting to vsdebugger.azureedge.net (vsdebugger.azureedge.net)|2620:1ec:bdf::66|:443... connected.
HTTP request sent, awaiting response... 409 Public access is not permitted on this storage account.
2025-12-16 20:07:35 ERROR 409: Public access is not permitted on this storage account..
```

## Steps to Reproduce ##

switch to pre-release

## Expected Behavior ##

## Actual Behavior ##

## Logs ##

### 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**: 1.103.1
**C# Extension**: 2.0.251
**Using OmniSharp**: false

Dotnet Information
Cannot find language server in path '/home/piersh/.vscode-server/extensions/ms-dotnettools.csharp-2.0.251/.roslyn/Microsoft.CodeAnalysis.LanguageServer'
Visual Studio Code Extensions

|Extension|Author|Version|Folder Name|
|---|---|---|---|
|autoscrolldown|foxx1337|1.2.1|foxx1337.autoscrolldown-1.2.1|
|command-variable|rioj7|1.68.0|rioj7.command-variable-1.68.0|
|csdevkit|ms-dotnettools|1.90.2|ms-dotnettools.csdevkit-1.90.2-linux-x64|
|csharp|ms-dotnettools|2.0.251|ms-dotnettools.csharp-2.0.251|
|edit-with-shell|ryu1kn|1.3.0|ryu1kn.edit-with-shell-1.3.0|
|EditorConfig|EditorConfig|0.17.4|editorconfig.editorconfig-0.17.4|
|gitlens|eamodio|17.7.1|eamodio.gitlens-17.7.1|
|tasks-shell-input|augustocdias|1.19.1|augustocdias.tasks-shell-input-1.19.1|
|vscode-dotnet-runtime|ms-dotnettools|3.0.0|ms-dotnettools.vscode-dotnet-runtime-3.0.0|;

Extension version: 2.0.251
VS Code version: Code 1.103.1 (360a4e4fd251bfce169a4ddf857c7d25d1ad40da, 2025-08-12T16:25:40.542Z)
OS version: Windows_NT x64 10.0.26200
Modes:
Connection to 'wsl+rocky9' could not be established
Remote OS version: Linux x64 6.6.87.2-microsoft-standard-WSL2
Remote OS version: Linux x64 6.6.87.2-microsoft-standard-WSL2
Remote OS version: Linux x64 6.6.87.2-microsoft-standard-WSL2
Remote OS version: Linux x64 6.6.87.2-microsoft-standard-WSL2

System Info

|Item|Value|
|---|---|
|CPUs|12th Gen Intel(R) Core(TM) i9-12900HK (20 x 2918)|
|GPU Status|2d_canvas: enabled
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
skia_graphite: disabled_off
trees_in_viz: disabled_off
video_decode: enabled
video_encode: enabled
vulkan: disabled_off
webgl: enabled
webgl2: enabled
webgpu: enabled
webnn: disabled_off|
|Load (avg)|undefined|
|Memory (System)|31.68GB (12.27GB free)|
|Process Argv||
|Screen Reader|no|
|VM|0%|

Connection to 'wsl+rocky9' could not be established

|Item|Value|
|---|---|
|Remote|WSL: Rocky9|
|OS|Linux x64 6.6.87.2-microsoft-standard-WSL2|
|CPUs|12th Gen Intel(R) Core(TM) i9-12900HK (20 x 0)|
|Memory (System)|29.37GB (24.89GB free)|
|VM|0%|

|Item|Value|
|---|---|
|Remote|WSL: Rocky9|
|OS|Linux x64 6.6.87.2-microsoft-standard-WSL2|
|CPUs|12th Gen Intel(R) Core(TM) i9-12900HK (20 x 0)|
|Memory (System)|29.37GB (24.89GB free)|
|VM|0%|

|Item|Value|
|---|---|
|Remote|WSL: Rocky9|
|OS|Linux x64 6.6.87.2-microsoft-standard-WSL2|
|CPUs|12th Gen Intel(R) Core(TM) i9-12900HK (20 x 0)|
|Memory (System)|29.37GB (24.89GB free)|
|VM|0%|

|Item|Value|
|---|---|
|Remote|WSL: Rocky9|
|OS|Linux x64 6.6.87.2-microsoft-standard-WSL2|
|CPUs|12th Gen Intel(R) Core(TM) i9-12900HK (20 x 0)|
|Memory (System)|29.37GB (24.89GB free)|
|VM|0%|