[Auto Bench] Integrate push-based CDN to scripts of auto benchmarking on AWS

[dailinsubjam]

Closes #2827

This PR:

• Adds script of running benchmarks with push-based CDN together with a README on running locally
• Does some minor changes to benchmark output structure and input parameters
• Adds some benchmark results

This PR does not:

Key places to review:

How to test this PR:

scripts/benchmarks_results/README.md

[dailinsubjam]

Converted to draft for now as I have some more things to change...should be back to "ready for review" by EOD