[ML] Migrate custom EuiInMemoryTable to EuiDataGrid

[walterra]

This is a meta issue to both keep track of issues with the existing custom EuiInMemoryTable and the migration to EuiDataGrid.

Tables to be migrated

• Transforms: Source index preview [ML] Use EuiDataGrid for transform wizard. #52510
• Transforms: Pivot preview [ML] Use EuiDataGrid for transform wizard. #52510
• Analytics: Outlier detection exploration view [ML] Data Frame Analytics: Use EuiDataGrid for outlier result page #58235
• Analytics: Regression exploration view [ML] DF Analytics Regression exploration: replace table with data grid #63650
• Analytics: Classification exploration view

Custom EuiInMemoryTable issues

• 0 Numerics and False Bools do not Appear in Outlier Results Tables [ML] 0 Numerics and False Bools do not Appear in Outlier Results Tables #51290
• Booleans are shown as yes/no instead of true/false [ML] Fix boolean cell values in analytics table result views and transforms wizard. #62618
• The fields/columns are determined by analyzing result documents. It has the advantage of not relying of fields caps or index patterns and works with any index out of the box. But it also has issues: Not all returned docs might have all fields populated, so we can miss fields/columns [ML] Data Frames Does Not Show All Index Fields #43325 [ML] DF analytics: Set columnType using field caps API to fix alignment and sort issues #49946
• The above can mean that sometimes the outlier column is missing from the outlier detection exploration view! This can also happen after the first load, e.g. after toggling columns in the dropdown menu. Fixed in [ML] EuiDataGrid ml/transform components. #63447
• The column type is sometimes not correctly inferred form source documents, resulting in wrong left/right alignment. Fixed in [ML] EuiDataGrid ml/transform components. #63447
• Improve display of right-aligned and left-aligned columns next to each other (EuiDataGrid's cell borders might be enough to solve this)

[elasticmachine]

Pinging @elastic/ml-ui (:ml)

[Winterflower]

Thanks for the discussion on Slack yesterday, @walterra !
As mentioned, in addition to the "Booleans are showing up yes/no", it would be nice to be able to use the query bar above the DF Analytics results table to see which documents are misclassified. For example, in a boolean case, I might want to see where the value in ml.predicted_label does not match the value in label which was the dependent_variable in the DF Analytics job. If I were doing it in a programming language, I would do something like this
ml.predicted_label != label
in Python.
I've been trying to look up examples of how to do this in KQL, but haven't been able to find anything.

[pheyos]

Two observations:

• When I move a column in the selection pop-up, the table reflects that change, but the pop-up still shows it in the old location
• When I hide the outlier_score column, all the feature_influence columns disappear from the column selection pop-up and they don't come back when I re-select the outlier_score column

[walterra]

All custom EuiInMemoryTable usages have been migrated to EuiDataGrid. To track further improvements, I created a follow-up meta issue: #64418