Don't reinstall dependencies on arch linux (#7801)

Very minor quality of life update, passing the --needed flag to pacman
to skip reinstalling up to date dependencies.

Release Notes:

- N/A

script/linux

@@ -38,7 +38,7 @@ if [[ -n $pacman ]]; then
     fontconfig
     vulkan-validation-layers
   )
-  $maysudo "$pacman" -S --noconfirm "${deps[@]}"
+  $maysudo "$pacman" -S --needed --noconfirm "${deps[@]}"
   exit 0
 fi