Try for a reproducer of a host code's build environment failure

[agcapps]

Summary

• This PR is a bugfix
• It attempts to do the following:
  • Add a spec to approximate a host code
  • Fixes #1156 with contributions from @adayton1
  • Adds a test case specifically reproducing the build failure from #1156

The fixes all involve arrays of Point objects or arrays of objects that contain a Point.

[agcapps]

I can't get it to build mfem yet, because hypre has a problem building. I'm sure I need to change the spack setup to properly point it to the system netlib-lapack. TPLs build when I use ~mfem and ^cuda+allow-unsupported-compilers. And this also builds, so there is something still different between this build environment and the build failure I'm seeing.