dfilemaker: exit on unrecognized option and remove duplicate longopts struct

[ofaaland]

(1) A duplicate longopts struct introduced during a rebase, when creating a PR to add

        commit 1187ecf27e5ffb76b5a2ee0334d3b0925c0b32ff
        Author: Olaf Faaland <faaland1@llnl.gov>
        Date:   Thu Nov 21 16:19:03 2024 -0800

            dfilemaker: define options near print_usage()

            Define the strings passed to getopt_long, short_options and
            long_options, next to each other and next to print_usage() so
            it's easier to ensure they stay synchronized with each other.

            Signed-off-by: Olaf Faaland <faaland1@llnl.gov>

(2) In addition, when adding support for "--verbose", some parts of the code
were changed from "version" to "verbose", but some were missed.

(3) If getopt_long() encounters an unknown option, print usage information
and stop execution.

Continuing to process options and create files, after encountering an
unknown option, will create a file tree different than the one the user
intended. For example, if the user mistypes the option for file size,
e.g.
"--sizeRRR=2MB-10000GB"
instead of
"--size=2MB-10000GB"

proceeding would mean we use the default file size range when
constructing the tree instead of the one the user intended.