Babelstream

[rfhaque]

Description

This PR fixes the babelstream benchmark. Supersedes #639. Closes #615.
Tested on tuolumne (openmp, rocm modes) and matrix (cuda mode)

Currently the application uses a source repo that implements caliper. The following steps must be completed before this PR can be merged

• Merge PR Adding caliper annotations UoB-HPC/BabelStream#213 into the BabelStream source
• Change the URL for the BabelStream source repo in Benchpark.
• Update to Spack 1.0 @scheibelp

Adding/modifying a benchmark (docs: Adding a Benchmark)

• If package.py upstreamed to Spack is insufficient, add/modify repo/benchmark_name/package.py plus: create, self-assign, and link here a follow up issue with a link to the PR in the Spack repo.
• Add/modify an experiments/benchmark_name/experiment.py to define a single node and multi-node experiments
• Add/modify a dry run unit test in .github/workflows/run.yml

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 40.82%. Comparing base (143e691) to head (9a48c56).

Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #910   +/-   ##
========================================
  Coverage    40.82%   40.82%           
========================================
  Files           22       22           
  Lines         1536     1536           
  Branches       219      219           
========================================
  Hits           627      627           
  Misses         864      864           
  Partials        45       45           

Flag	Coverage Δ
unittests	40.82% <ø> (ø)

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[scheibelp]

one compatibility issue w/ #953

[scheibelp]

referring to builtin changed w/ #953 - see https://github.com/LLNL/benchpark/blob/develop/repo/blt/package.py for example of how to import from builtin

[pearce8]

@rfhaque please resolve so we can merge.