Add support for parallel tools based on the 3rd party library mpiFileUtils (libMFU) … (#1177)

Adds tool h5dwalk and configure options to enable building it.

Co-authored-by: Richard Warren <Richard.Warren@hdfgroup.org>
Co-authored-by: github-actions <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Richard.Warren <richard.warren@jelly.ad.hdfgroup.org>
Co-authored-by: Larry Knox <lrknox@hdfgroup.org>

utils/tools/test/h5dwalk/help.h5dwalk

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+
+Usage: h5dwalk [options] <path> ...
+
+Options:
+  -i, --input <file>      - read list from file
+  -o, --output <file>     - write output summary to the named file.
+  -E, --error  <file>     - write processed errors to file in text format
+  -l, --log_text <dir>    - write individual tool outputs to a file. Logs can be written to an optional named directory.
+  -T, --tool <executable> - name of the HDF5 tool to invoke
+  -h, --help              - print usage
+
+For more information see https://mpifileutils.readthedocs.io. 
+