Add Automitigator that can identify mitigations by searching.

[yrajas]

• Uses FLAML to define a search space of all possible mitigations.
• Searches mitigation configurations from the search space and applies those mitigations to the dataset.
• Evaluates different configurations in accordance with the time/number of searches constraints to identify the best sequence of mitigations and AutoML model.

[codecov[bot]]

Codecov Report

Attention: 5 lines in your changes are missing coverage. Please review.

Comparison is base (4d0a9e9) 96.25% compared to head (8027c77) 96.34%.

Files	Patch %	Lines
raimitigations/automitigator/evaluator.py	95.29%	4 Missing :warning:
raimitigations/automitigator/automitigator.py	97.61%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #56 +/- ## ========================================== + Coverage 96.25% 96.34% +0.09% ========================================== Files 49 55 +6 Lines 4516 4738 +222 ========================================== + Hits 4347 4565 +218 - Misses 169 173 +4 ```

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