Why do Xbox Game Pass exe's have to run as detached?

# Problem
I think it's related to one of the existing Sunshine issues with administrative mode on Windows. If I had to guess it's more of an issue with the jankiness of Xbox Game Pass exes in general, but obviously running as detached can be annoying because the app won't close when the stream ends/is quit

# Solution
Unsure

# Workaround
- Run Game Pass games as detached
- Instead of launching `gamelaunchhelper.exe`, can we try to directly find the exe?
- No, when I did this I got a "No video received from host error" but it DID launch the game on my host

Start by tracing how the launcher handles gamelaunchhelper.exe and compare that with launching a Game Pass executable directly. Reproduce the detached and direct-launch cases, including the "No video received from host" result. Done means identifying a reliable launch path that lets the game close when streaming ends while still producing video.

Written by the indexing model from the issue text.