Drop meson from packages

Generally meson can't be used standalone and you need various other
tools as well, so drop it from the image in favor of using a container
or similar environment to provide meson and related tools.

Author: DaanDeMeyer

mkosi.conf

@@ -47,7 +47,6 @@ Packages=
         less
         libfido2
         man
-        meson
         mtools
         nano
         nftables