Export job perf raw data into an mlflow artifact

[jfomhover]

Will export the perf reports into a json artifact (could use csv later) so it can be consumed by an analysis script.

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Unit Test Results for Build

    1 files  ±0      1 suites  ±0   1m 18s :stopwatch: +6s 111 tests ±0  111 :heavy_check_mark: ±0  0 :zzz: ±0  0 :x: ±0 

Results for commit ce16116a. ± Comparison against base commit 24d885b9.

:recycle: This comment has been updated with latest results.

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Package	Line Rate	Branch Rate	Complexity
common	83%	0%	0
pipelines.azureml	80%	0%	0
scripts	100%	0%	0
scripts.data_processing.generate_data	92%	0%	0
scripts.data_processing.lightgbm_data2bin	95%	0%	0
scripts.data_processing.partition_data	92%	0%	0
scripts.inferencing.custom_win_cli	94%	0%	0
scripts.inferencing.lightgbm_c_api	75%	0%	0
scripts.inferencing.lightgbm_python	95%	0%	0
scripts.inferencing.lightgbm_ray	95%	0%	0
scripts.inferencing.treelite_python	94%	0%	0
scripts.model_transformation.treelite_compile	92%	0%	0
scripts.sample	93%	0%	0
scripts.training.lightgbm_python	77%	0%	0
scripts.training.lightgbm_ray	88%	0%	0
Summary	85% (1889 / 2229)	0% (0 / 0)	0