Replace cdemu + kernel module with fuseiso

This way userspace does all the work, and we don't need to include an
out-of-tree kernel module. Ta da!

mkosi.conf.d/00-packages-core.conf

@@ -100,7 +100,6 @@ Packages=
     flatpak # Flatpak apps
     fuse2 # Some AppImage apps
     fuse3 # The rest of the AppImage apps (also loads of other things as a required dependency)
-    vhba-module # Kernel module needed for cdemu-client
 
     # Virtualization/VM integration
     dnsmasq # Hotspot creation and networking in VMs

mkosi.conf.d/80-packages-cli.conf

@@ -38,13 +38,13 @@ Packages=
     bash-completion # Completions for Bash
     bat # Opinionated fancy cat
     bluez-utils # useful Bluetooth CLI tools
-    cdemu-client # Virtual optical drive support for CDEmu disc image mounting
     cpupower # For more granular tuning of CPU limits; needs to touch the kernel
     drm-info # for debugging KWin and other graphics issues
     duf # Opinionated fancy df
     espeak-ng # CLI-invoked speech; accessible automation feedback
     fastfetch # For showing off on r/unixporn
     fd # Opinionated fancy find
+    fuseiso # Userspace ISO mounting
     fzf # Fuzzy find
     git # It's git
     git-lfs # Git extension needed for versioning large files