various grub2 cleanups
    
    - drop deprecated groups from the macros file, already gone from main spec.
    - don't ship arch specific bits in tools-extra that are already special cased in tools
    - move grub2-glue-efi to tools-efi, it's Mac specific and there's othe Mac efi tools there
    - drop tools-extra dep for efi binaries, all in tools-efi and anaconda deals with that
    - put grub2-install man page in the right package with the util
    - other minor cleanups