Enable `parthenon::par_reduce` for MD loops with Kokkos 1D Range

[acreyes]

PR Summary

Replaces KOKKOS_LAMBDAs with templated functors in par_dispatch(LoopPatternFlatRange, ...) that deduce the signature of the provided function to allow for extra arguments used in reductions.

Makes it possible to use par_reduce(DEFAULT_LOOP_PATTERN, ..) & par_reduce(name, ...)

PR Checklist

• [x] Code passes cpplint
• [ ] New features are documented.
• [x] Adds a test for any bugs fixed. Adds tests for new features.
• [x] Code is formatted
• [x] Changes are summarized in CHANGELOG.md
• [ ] Change is breaking (API, behavior, ...)
  • [ ] Change is additionally added to CHANGELOG.md in the breaking section
  • [ ] PR is marked as breaking
  • [ ] Short summary API changes at the top of the PR (plus optionally with an automated update/fix script)
• [ ] CI has been triggered on Darwin for performance regression tests.
• [ ] Docs build
• [ ] (@lanl.gov employees) Update copyright on changed files

[acreyes]

Thanks for the PR!

Out of curiosity, was there a specific use and/or performance consideration that inspired these changes?

Not any performance consideration. I was wanting to use par_reduce with similar default arguments as I was with par_for

[pgrete]

All tests pass. I'm force merging.