Preseed ASV machine configuration in benchmark workflow

[oesteban]

Summary

• preseed the github-actions ASV machine metadata before running benchmarks so the workflow runs non-interactively
• run asv with the preseeded machine name while retaining the existing config path resolution

Testing

• not run (workflow change)

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https://chatgpt.com/codex/tasks/task_e_68e4ec14124c83308e61f8d1529b2aec

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 78.65%. Comparing base (3f70e4b) to head (24b9745).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #269   +/-   ##
=======================================
  Coverage   78.65%   78.65%           
=======================================
  Files          24       24           
  Lines        1443     1443           
  Branches      166      166           
=======================================
  Hits         1135     1135           
  Misses        237      237           
  Partials       71       71           

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