Added new data for distributed closest point tests.

[gunney1]

Added small 2D, multidomain meshes for testing distributed closest point search. The search code now supports domain over- and underloading by using multidomain meshes.

The script for generating simple multidomain meshes will be added to Axom but will not be used in test recipes because it requires a conduit library configured with python3 and hdf5.

[agcapps]

Thanks, Brian.

[rhornung67]

Thanks @gunney1 why can't we test with HDF5 and python3? Our TPL build of conduit is built with HDF5 and python3 is supported on LC platforms.

[gunney1]

Thanks @gunney1 why can't we test with HDF5 and python3? Our TPL build of conduit is built with HDF5 and python3 is supported on LC platforms.

@rhornung67 We can. But the conduit build itself has to be configured to support its python interface. /usr/WS1/axom/libs/toss_3_x86_64_ib/2022_07_05_19_44_26/clang-9.0.0/conduit-0.8.3, which is what the host config for rzgenie uses, wasn't configured with python3.

Moreover, I'm not sure we want to run the mesh generation script as part of the axom test. It's more of an exercise in using conduit.

[kennyweiss]

@rhornung67 -- I suspect that using Conduit's python interface requires configuring conduit as a shared library.
We can add a host-config with that option (and might have had one in the past(?)) but I don't think we currently have that configuration.