MueLu: Fixed data races, nondeterminism in 2b

[brian-kelley]

(kokkos refactor, phase 2b uncoupled aggregation, deterministic version)

@trilinos/

Description

Motivation and Context

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Checklist

• My commit messages mention the appropriate GitHub issue numbers.
• My code follows the code style of the affected package(s).
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the code contribution guidelines for this project.
• I have added tests to cover my changes.
• All new and existing tests passed.
• No new compiler warnings were introduced.
• These changes break backwards compatibility.

Additional Information