Optional artifact logging for MLFlow

[ShreyaR]

Skip artifact logging for MLFlowCallback with an initialization parameter

[github-actions[bot]]

Unit Test Results

       6 files  ±  0         6 suites  ±0   2h 44m 10s :stopwatch: - 2m 32s 2 970 tests +  4  2 916 :heavy_check_mark: +2    54 :zzz: +2  0 :x: ±0  8 910 runs  +12  8 712 :heavy_check_mark: +6  198 :zzz: +6  0 :x: ±0 

Results for commit 4952492d. ± Comparison against base commit d25124ff.

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