Closes #46933 

Before you mark this PR as ready for review, make sure that you have:
- [x] Added a solid test coverage and/or screenshots from doing manual
testing
- [x] Done a self-review taking into account security and performance
aspects
- [x] NO UI CHANGES


Release Notes:
- Fixed `Failed to load shell environment` errors on Windows when users
have custom terminal shell arguments configured (e.g., cmd.exe with `/k
echo Hello` or similar startup commands)