When loading a LAMBDA project with a custom workingDirectory in launchSettings.json - the value is incorrectly changed

**Describe the bug**
When loading a LAMBDA project with a custom workingDirectory in launchSettings.json - the value is incorrectly changed - but ONLY if the AWS Toolkit is installed.

**To Reproduce**
1. Create a custom lambda project
2. Edit the workingDirectory value to use a different var (like $(OutputPath))
3. Save and close the project.
4. Close Visual Studio
5. Reopen Visual Studio and reopen the project
6. Open the launchSettings.json
7. The workingDirectory is set to a different value

**Expected behavior**
The workingDirectory should NOT be changed from the value set in step 2

**Development System (please complete the following information):**
- Windows Version: Windows 10
- Visual Studio Version: Visual Studio 2022
- AWS Toolkit for Visual Studio Version: Latest

Start by reproducing the behavior with a custom Lambda project and inspect launchSettings.json before and after closing and reopening Visual Studio. Trace which AWS Toolkit project-loading path changes workingDirectory, then verify that a value such as $(OutputPath) remains unchanged after reopening the project.

Written by the indexing model from the issue text.