Update `gamescope` to `3.16.2` or later

Gamescope 3.16.2 fixed a bug with gamescope spam-setting a custom icon, causing any host desktop that handles them (i.e plasmashell) to lag out as it tries to process hundreds of icon changes a second. This causes performance to be severely degraded when running any sort of gamescope workload even when it would otherwise be a walk in the park.

As such, I wanna ask about potentially shipping a newer version of gamescope in Bazzite or alternatively cherry-picking 918b61 (not sure if Bazzite has some sort of custom Gamescope build) to resolve this issue