Convert TrialResult to DataFrame #6294

Description

TrialResult gives you important information about each trial AutoML runs as part of an experiment. Although today we have the NotebookMonitor for real-time visualizations and feedback during training, once training is done, to get similar information, users have to write their own code to access each of these pieces of information.

Proposal

Given an AutoML experiment called experiment, when training is done, users should be able to call ToDataFrame to convert the results of an AutoML experiment into a DataFrame.

TrialResult experimentResults = await experiment.RunAsync();
DataFrame results = experimentResults.ToDataFrame();

The result should display columns with information for each of the trials in a DataFrame similar to the following:

From there, if users to sort / query the results using the built-in DataFrame methods, they can. Additionally, they can export to CSV using the WriteCsv method.