fix: use env to lookup the path variable

[imLinguin]

Closes #5477

On systems where which or where commands are not accessible we would fail. However ideally we shouldn't rely on those commands as what they do is simply check PATH env, we can do it ourselves.

Use the following Checklist if you have changed something on the Backend or Frontend:

• Tested the feature and it's working on a current and clean install.
• Tested the main App features and they are still working on a current and clean install. (Login, Install, Play, Uninstall, Move games, etc.)
• Created / Updated Tests (If necessary)
• Created / Updated documentation (If necessary)