Benchmark Axom Array vs C++ array and std::vector

[bmhan12]

We should see how axom::Array performs relative to std::vector and C++ arrays, and optimize where we can.

[rhornung67]

Randy did some similar exploration several years ago and generated a lot of interesting data with multiple compilers. That may be insightful for this issue.

[bmhan12]

Difference in emplace_back() performance observed in discussion here between axom:Array and std::vector: #1419 (comment)