Add SWE Bench seeder for DAP evaluations

What does this MR do and why?

Add rake task to seed swebench data hosted on langsmith.

• Add rake task gitlab:duo:swe_bench_seeder
• Fetch examples from LangSmith dataset (configurable via env vars).
• Clone repositories from GitHub and create issues from problem statements
• Create an output dataset on langsmith with a single column containing the list of created issues to be used by cef.

References

Seeded projects	Seeded issue

How to set up and validate locally

Example running the full seeder:

bundle exec rake gitlab:duo:swe_bench_seeder

Example with a project:

bundle exec rake 'gitlab:duo:swe_bench_seeder[matplotlib]'

MR acceptance checklist

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