* nongnu/packages/steam-client.scm: Use pulseaudio and nonguix utils modules.
(steam-gameruntime-libs): Add pulseaudio.
(nonguix-container->package): Add alsa-config to inputs.
(make-container-internal): Add alsa-config to args and inputs.
(make-internal-script): Add alsa-config to args and symlinks, symlink
32-bit Vulkan ICD files.