Improve readability of "received run arguments" in compute worker logs

[Didayolo]

The "received run arguments" in compute worker logs are hard to read:

Actually I blurred the capture because I realized some information may be confidential here.

We could have one line of each argument, and a clear display like :

Competition link: https://[...]
Submissino ID: [...]
[...]

Relevant line of code:

codabench/compute_worker/compute_worker.py

Line 113 in 6b6877c

logger.info(f"Received run arguments: {run_args}")

We can take inspiration from utkutvskin's fork update:

https://github.com/utkutvskin/codabench/pull/1/files