Adding Benchmarks to agbench

[husseinmozannar]

Why are these changes needed?

Adding benchmarks back into autogen. Namely GAIA, Assistantebench, WebArena and HumanEval.

PR is a draft while we figure out licenses.

Related issue number

Related PR #3711 - was part of that but moved to separate PR to not block agbench

Checks

• I've included any doc changes needed for https://microsoft.github.io/autogen/. See https://microsoft.github.io/autogen/docs/Contribute#documentation to build and test documentation locally.
• I've added tests (if relevant) corresponding to the changes introduced in this PR.
• I've made sure all auto checks have passed.

[husseinmozannar]

@afourney added license files to benchmarks

[afourney]

Can we move the licenses into the folder where we are using code? So eval_utils, and common? We should also get sign-off from folks who know better how this is usually done. To be clear, these license don't apply to most of the code... only the small eval scripts.

[husseinmozannar]

Can we move the licenses into the folder where we are using code? So eval_utils, and common? We should also get sign-off from folks who know better how this is usually done. To be clear, these license don't apply to most of the code... only the small eval scripts.

Done!

[afourney]

Thanks! Looks good.