iso: fix packages.x86_64 (no inline comments; gstreamer-vaapi -> gst-plugin-va)

Inline comments after a package name broke kitty/flatpak (became invalid
names with trailing whitespace). gstreamer-vaapi was removed from Arch.
calamares is AUR-only -> commented pending a [tanin] rebuild decision.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

iso/build-profile/airootfs/etc/calamares/modules/bootloader.conf

@@ -0,0 +1,9 @@
+---
+efiBootLoader: "systemd-boot"
+kernel:   "/vmlinuz-linux-zen"
+img:      "/initramfs-linux-zen.img"
+fallback: "/initramfs-linux-zen-fallback.img"
+timeout:  "3"
+# Plymouth splash + quiet boot on the installed system.
+kernelParams: [ "quiet", "splash", "rw" ]
+installEFIFallback: true