docs: add AWS (EC2/SageMaker) deployment + benchmarking guide (#3352)

* docs: add AWS (EC2/SageMaker) deployment + benchmarking guide

- Add an AWS deployment tutorial for EC2 + SageMaker
- Fix SageMaker example indentation and link to the new guide
- Add the new guide to the docs toctree

* docs: address AWS deployment review feedback

* Apply suggestion from code review

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Co-authored-by: Fahad Alghanim <fkalghan@email.sc.edu>
Co-authored-by: Alvaro Bartolome <36760800+alvarobartt@users.noreply.github.com>