Support threshold-based triggering for alibi-detect MMD

[MaxiBoether]

Per the title

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 75.00000% with 3 lines in your changes missing coverage. Please review.

Project coverage is 82.88%. Comparing base (c6622d3) to head (ab95abf).

Files	Patch %	Lines
...nfig/schema/pipeline/trigger/drift/alibi_detect.py	77.77%	2 Missing :warning:
...pervisor/internal/triggers/drift/alibi_detector.py	66.66%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #560 +/- ## ========================================== - Coverage 82.89% 82.88% -0.02% ========================================== Files 226 226 Lines 10419 10430 +11 ========================================== + Hits 8637 8645 +8 - Misses 1782 1785 +3 ```

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[github-actions[bot]]

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