Implement incremental rate type

[albertoperdomo2]

Summary

This PR adds a new rate type incremental to the suite of benchmarks. This new rate type starts at a specified initial rate --start-rate and linearly increases the request rate over time by --increment-factor, offering an optional rate limit --rate-limit to cap the maximum rate. This simulates, as the name implies, load ramp up along time.

Reimplementation of #291 after the new release.

Details

• Added new CLI flags mentioned before: --start-rate, --increment-factor and --rate-limit.
• Added a new profile IncrementalProfile class.
• Implemented AsyncIncrementalStrategy scheduler strategy that handles the logic and includes the optional initial burst.

Test Plan

Related Issues

• Resolves #

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Use of AI

• Includes AI-assisted code completion
• Includes code generated by an AI application
• Includes AI-generated tests (NOTE: AI written tests should have a docstring that includes ## WRITTEN BY AI ##)