[NETE2ESDK][Ubuntu 26.04][LLM] The install tool is used and try to install SDK when asking agent to install .net runtime on Ubuntu 26.04

### Describe the bug.

The install tool is used and try to install SDK when asking agent to install .net runtime on Ubuntu 26.04

### Please attach log file(s) here if you have any.

[logs.zip](https://github.com/user-attachments/files/28542423/logs.zip)

### Reproduction Steps

1. On Ubuntu 26.04 , login VSCode with your GitHub Account to enable usage of CoPilot
2. Ask the agent in the chat window to install .net runtime
3. Observe

### Expected Behavior

It is OK that if the install tool is not used and the runtime should be installed successfully.

### Exceptions & Errors (if any)

The install tool is used and try to install SDK when asking agent to install .net runtime

Note: the issue - unsupported SDK is required is tracking by https://github.com/dotnet/vscode-dotnet-runtime/issues/2699

### .NET Install Tool Version

3.1.0-b

### Your operating system? Please provide more detail, such as the version and or distro above.

Linux

### VS Code Version

1.222.1