Move benchcomp YAML file to avoid spurious GitHub errors

[tautschnig]

GitHub reported "No event triggers defined in on" for github/workflows/benchcomp-config.yaml, which was never to define any GitHub actions in the first place. Move the Benchcomp config and the Benchcomp parser to a directory of their own to avoid these spurious warnings.

• Each commit message has a non-empty body, explaining why the change was made.
• n/a Methods or procedures I have added are documented, following the guidelines provided in CODING_STANDARD.md.
• n/a The feature or user visible behaviour I have added or modified has been documented in the User Guide in doc/cprover-manual/
• Regression or unit tests are included, or existing tests cover the modified code (in this case I have detailed which ones those are in the commit message).
• n/a My commit message includes data points confirming performance improvements (if claimed).
• My PR is restricted to a single feature or bugfix.
• n/a White-space or formatting changes outside the feature-related changed lines are in commits of their own.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 79.64%. Comparing base (e7b0557) to head (b8f78a0).

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #8250   +/-   ##
========================================
  Coverage    79.64%   79.64%           
========================================
  Files         1684     1684           
  Lines       195670   195670           
========================================
  Hits        155841   155841           
  Misses       39829    39829           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.