Energy APIs: Print and JSON (PR from fork/304)

[slabasan]

Original PR is https://github.com/LLNL/variorum/pull/304.

Fixes https://github.com/LLNL/variorum/issues/209

TODO:

• [x] JSON implementation on IBM
• [x] JSON implementation on Intel
• [x] Multi-architecture build should not call the GPU platforms
• [x] Get energy for Intel
• [x] Update print energy output and print verbose output to match other APIs.
• [x] Update print-verbose-energy example

Commit message: Add support for get/print energy APIs

Expands support for variorum_print_energy and adds two new APIs -- variorum_print_verbose_energy, variorum_get_energy_json on Intel and IBM platforms.