fix to install fortran mod files

[mauneyc-LANL]

PR Summary

CMake was not properly installing fortran module files when invoking make install. These changes explicitly install the module files.

I'm working on a more robust solution than hand-copying the files, but otherwise this addresses the prior flaw.

PR Checklist

• Adds a test for any bugs fixed. Adds tests for new features.
• Format your changes by using the make format command after configuring with cmake.
• Document any new features, update documentation for changes made.
• Make sure the copyright notice on any files you modified is up to date.
• After creating a pull request, note it in the CHANGELOG.md file

[Yurlungur]

Should we add some test for the fortran install so we know it works in the future?

[mauneyc-LANL]

Should we add some test for the fortran install so we know it works in the future?

No opinion; but would probably do it in a separate update