Clion isn't recognized on Linux

Setting CLion as the default IDE causes Unreal to not recognize it as a compiler. You are unable to compile C++ projects or create new ones with it set this way.

This was reported and tested in 4.24.3 (CL-11590370). This was reproduced in 4.23.1 (CL-9631420), 4.25 Preview 7 (CL-12759524), and Main 4.26 (CL-13049875)

1. Install Clion if you don't already have it
2. Add the folder containing clion.sh to the PATH
3. Open the UE4Editor and create a Blank C++ project
4. Open Editor Preferences and set the Source Code Editor to CLion
5. Restart the Editor

Results: Compile button disappears, all new projects fail due to "no compiler found", and can't open CLion from UE4 file menu.

Expected: For Clion to function as the default IDE