Added Multicpu SLURM example .sh script in examples/slurm folder

[okhleif-IL]

This PR contributes a multicpu SLURM example script in the examples/slurm folder.

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• [ ] This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
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• [ ] Did you make sure to update the documentation with your changes? Here are the documentation guidelines, and here are tips on formatting docstrings.
• [ ] Did you write any new necessary tests?

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