Proton (maybe just vulkan?) games don't work when in integrated or compute graphics modes

[csfalcione]

Distribution (run cat /etc/os-release):
NAME="Pop!_OS"
VERSION="22.04 LTS"
ID=pop
ID_LIKE="ubuntu debian"
PRETTY_NAME="Pop!_OS 22.04 LTS"
VERSION_ID="22.04"
HOME_URL="https://pop.system76.com"
SUPPORT_URL="https://support.system76.com"
BUG_REPORT_URL="https://github.com/pop-os/pop/issues"
PRIVACY_POLICY_URL="https://system76.com/privacy"
VERSION_CODENAME=jammy
UBUNTU_CODENAME=jammy
LOGO=distributor-logo-pop-os

Related Application and/or Package Version (run apt policy $PACKAGE NAME):
system76-power:
Installed: 1.1.21165531658522.0454179be
Candidate: 1.1.21165531658522.0454179be
Version table:
*** 1.1.21165531658522.04~54179be 1001
1001 http://apt.pop-os.org/release jammy/main amd64 Packages
100 /var/lib/dpkg/status

steam:i386:
Installed: 1:1.0.0.74-1pop1164493657522.046d77918
Candidate: 1:1.0.0.74-1pop1164493657522.046d77918
Version table:
1:1.0.0.74-1ubuntu2 500
500 http://us.archive.ubuntu.com/ubuntu jammy/multiverse i386 Packages
*** 1:1.0.0.74-1pop1164493657522.04~6d77918 1001
1001 http://apt.pop-os.org/release jammy/main i386 Packages
100 /var/lib/dpkg/status

^ steam package version 1654574690

Issue/Bug Description:
When the discrete gpu is unavailable for games (integrated or compute modes), nvidia_idc.json isn't removed/disabled in /usr/share/vulkan/icd.d. With my current setup (rog flow x13, 6900hs, 3050), this results in many steam games failing to start.

Steps to reproduce (if you know):

1. Enter integrated/compute graphics mode
2. Attempt to run steam game via proton (for example, Dark Souls Remastered or Guilty Gear: Strive)
   -> (integrated) Observe that the game never launches a window and steam eventually silently gives up
   -> (compute) Observe that the game manages to launch a window then immediately crashes

Expected behavior:
Games can launch on integrated graphics.

Other Notes:
Workaround: rename /usr/share/vulkan/icd.d/nvidia_icd.json to /usr/share/vulkan/icd.d/nvidia_icd.json.disabled when on integrated graphics mode.