RAJA-Caliper improvements for applications
Summary
Adds a global function to turn on/off caliper profiling when caliper is enabled. This PR will depend on: https://github.com/LLNL/RAJA/pull/1859
Consider an API that allows user to call https://github.com/LLNL/RAJA/blob/f9bf51237504dad9b625ee31a52a6604e57b8b90/include/RAJA/util/plugins.hpp#L36 and configure options
Consider moving the plugins into src/plugins -- keep as cpp files.
I think this ready for another review. Experimenting with the nvtx3 header library may need a bit more testing; I propose we follow it up in a different PR.
@adayton1 , I made another pass at the code. When you have some time could you take a look?