Bigcodebench

Fix some identified issues:
- The ground truth pass rate was not previously computed in the correct way.
- Passed RAM limits would raise errors, as they were set as float type.
- User permission is not correctly set up in the Evaluate Docker.

Features:
-- `check-gt-only` will print out the pass rate when finishing.

New features;

- The RAM setup is now adjustable via specific arguments.
- Parallel ground truth checking is supported. Potentially failed checks are skipped during execution. A warning will be issued if the ground truth pass rate falls below 0.95.

New features;

- The data is downloaded from HF hub by default.
- Data formats have been unified for the one on HF and the one on GitHub.