feat: Log commit sha

[robinholzi]

Motivation

To be able to link a pipeline rune with the code that has executed it, we want to log the git sha of the last commit in the pipeline logfile.

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 41.66667% with 7 lines in your changes missing coverage. Please review.

Project coverage is 82.29%. Comparing base (beb3769) to head (f12a451).

Files	Patch %	Lines
...yn/supervisor/internal/pipeline_executor/models.py	33.33%	4 Missing :warning:
modyn/supervisor/internal/utils/git_utils.py	50.00%	3 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #537 +/- ## ========================================== - Coverage 82.34% 82.29% -0.05% ========================================== Files 216 217 +1 Lines 10085 10097 +12 ========================================== + Hits 8304 8309 +5 - Misses 1781 1788 +7 ```

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[github-actions[bot]]

^{( % to main) ( % to main)}