Remove conflicting ownership of motd.d directories
    
    They are owned by the `setup` package [1], which `pam` requires, so
    owning these directories by `pam` is wrong and unnecessary.
    
    Also remove the /run/motd.d line from pamtmp.conf, which is also already
    present in the `setup` package's tmpfiles config file.
    
    Should fix warnings like this during package updates:
    ```
      Running scriptlet: libsepol-3.3-2.fc35.x86_64                                                  16/16
    /usr/lib/tmpfiles.d/pam.conf:4: Duplicate line for path "/run/motd.d", ignoring.
    /usr/lib/tmpfiles.d/setup.conf:2: Duplicate line for path "/run/motd.d", ignoring.
    ```
    
    Signed-off-by: Ondrej Mosnacek <omosnace@redhat.com>