Adding BabelSTREAM experiment class

[august-knox]

Description

Adding babelstream experiment class. Contains rocm, openmp, and openmp variants. Caliper annotations also available. array sizing is set to an arbitrary value right now, and can be adjusted in future.

Dependencies: None

Fixes issue(s): None

Type of Change

• {x} Adding a system, benchmark, or experiment
• {x} Modifying an existing system, benchmark, or experiment
• { } Documentation update
• { } Build/CI update
• { } Benchpark core functionality

Checklist:

If adding/modifying a system:

• { } Create a new directory for the system and a new system.py file
• { } Add a new dry run unit test in .github/workflows
• { } System appears in System Specifications table in docs catalogue section

If adding/modifying a benchpark:

• {x} Add a new application.py and (maybe) package.py under a new directory
  for this benchmark
• {x} Configure an experiment
• { } Benchmark appears in Benchmarks and Experiments table in docs catalogue
  section

If adding/modifying a experiment:

• {x} Extend experiment.py under existing directory for specific benchmark
• {x} Define a single node and multi-node experiments

If adding/modifying core functionality:

• { } Update docs
• { } Update .github/workflows and .gitlab/ci unit tests (if needed)