AutoML ExperimentResult plain TrainerName instead of "ReplaceMissingValues=>OneHotHashEncoding=>Concatenate=>Unknown=>SdcaMaximumEntropyMulti=>Unknown"

**System Information (please complete the following information):**
- OS & Version: Windows 11
- ML.NET Version: 0.20
- .NET Version: .NET 6.0

**Describe the bug**
Result of
Microsoft.ML.AutoML.MulticlassClassificationExperiment
public override ExperimentResult Execute(IDataView trainData, string labelColumnName = "Label", string samplingKeyColumn = null, IEstimator preFeaturizer = null, IProgress> progressHandler = null)

**Expected behavior**
Trainer name should be used trainer name not this "concatated long value"

**Screenshots, Code, Sample Projects**
Previous valid (0.17)

New version (0.20)