Use smart NVIDIA module loading on boot

This not only saves users from hard choices at boot, but also saves us
from a bunch of workarounds to avoid conflicts with Nouveau.

Should fix most of the black screen issues when booting ISO (but it's
not for sure...)

Signed-off-by: Vasiliy Stelmachenok <ventureo@cachyos.org>

archiso/pacman.conf

@@ -73,9 +73,12 @@ LocalFileSigLevel = Optional
 # The testing repositories are disabled by default. To enable, uncomment the
 # repo name header and Include lines. You can add preferred servers immediately
 # after the header, and they will be used before the default mirrors.
-
 [cachyos]
-SigLevel = Optional TrustAll
+# Yeah, that's dumb, but we have to do it for nvidia-module-extractor hook,
+# since mkarchiso doesn't import the keys inside rootfs for cachyos repo before
+# creating squashfs. The right solution here would be to find a way to import
+# the keys properly.
+SigLevel = Never
 Server = https://mirror.cachyos.org/repo/$arch/$repo
 
 #[core-testing]