Array Codegen

[JulianGCalderon]

• Adds lowering for storing and loading with both constant index and dynamic index.
• Adds example of array usage.
• Test the example against the expected output.

[github-actions[bot]]

Benchmarking factorial

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 75.00000% with 19 lines in your changes are missing coverage. Please review.

Project coverage is 61.28%. Comparing base (3c18e15) to head (7d96337).

Files	Patch %	Lines
crates/concrete_codegen_mlir/src/codegen.rs	75.00%	19 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## array-lowering #119 +/- ## ================================================== + Coverage 58.23% 61.28% +3.04% ================================================== Files 34 34 Lines 4317 4388 +71 ================================================== + Hits 2514 2689 +175 + Misses 1803 1699 -104 ```

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