[AI Test Tool] Update lines when changing input dataset (microsoft#1933)

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#### Summary <!-- Provide a general summary of your changes -->
When updating the input dataset of the suite, we should update the lines
to clearly reflect what dataset will be used for each line.

#### Work Item(s) <!-- Add the issue number here after the #. The issue
needs to be open and approved. Submitting PRs with no linked issues or
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Fixes
[AB#547352](https://dynamicssmb2.visualstudio.com/Dynamics%20SMB/_workitems/edit/543079/)

src/Tools/AI Test Toolkit/src/TestSuite/AITTestMethodLine.Table.al

@@ -213,6 +213,14 @@ table 149032 "AIT Test Method Line"
         exit(AITTestSuite."Input Dataset");
     end;
 
+    trigger OnInsert()
+    var
+        AITTestSuite: Record "AIT Test Suite";
+    begin
+        if AITTestSuite.Get(Rec."Test Suite Code") then
+            Rec."Input Dataset" := AITTestSuite."Input Dataset";
+    end;
+
     trigger OnDelete()
     var
         ALTestSuite: Record "AL Test Suite";

src/Tools/AI Test Toolkit/src/TestSuite/AITTestSuite.Table.al

@@ -46,6 +46,18 @@ table 149030 "AIT Test Suite"
             TableRelation = "Test Input Group".Code;
             ValidateTableRelation = true;
             ToolTip = 'Specifies the dataset to be used by the test suite.';
+
+            trigger OnValidate()
+            var
+                AITTestMethodLine: Record "AIT Test Method Line";
+            begin
+                if GuiAllowed() then
+                    if not Dialog.Confirm(InputDatasetChangedQst) then
+                        exit;
+
+                AITTestMethodLine.SetRange("Test Suite Code", Rec.Code);
+                AITTestMethodLine.ModifyAll("Input Dataset", Rec."Input Dataset", true);
+            end;
         }
         field(8; "Ended at"; DateTime)
         {
@@ -240,4 +252,5 @@ table 149030 "AIT Test Suite"
 
     var
         BaseVersionMustBeLessThanVersionErr: Label 'Base Version must be less than or equal to Version';
+        InputDatasetChangedQst: Label 'You have modified the input dataset.\\Do you want to update the lines?';
 }