Show skip/fail reason in dotnet test (#49806)

Author: Youssef1313

src/Cli/dotnet/Commands/Test/Terminal/TerminalTestReporter.cs

@@ -465,6 +465,7 @@ internal void TestCompleted(
         string instanceId,
         string testNodeUid,
         string displayName,
+        string? informativeMessage,
         TestOutcome outcome,
         TimeSpan duration,
         FlatException[] exceptions,
@@ -515,6 +516,7 @@ internal void TestCompleted(
                 targetFramework,
                 architecture,
                 displayName,
+                informativeMessage,
                 outcome,
                 duration,
                 exceptions,
@@ -538,6 +540,7 @@ private bool GetShowPassedTests()
         string? targetFramework,
         string? architecture,
         string displayName,
+        string? informativeMessage,
         TestOutcome outcome,
         TimeSpan duration,
         FlatException[] flatExceptions,
@@ -580,6 +583,14 @@ private bool GetShowPassedTests()
         terminal.SetColor(TerminalColor.DarkGray);
         terminal.Append(' ');
         AppendLongDuration(terminal, duration);
+
+        if (!string.IsNullOrEmpty(informativeMessage))
+        {
+            terminal.AppendLine();
+            terminal.Append(SingleIndentation);
+            terminal.Append(informativeMessage);
+        }
+
         if (_options.ShowAssembly)
         {
             terminal.AppendLine();

src/Cli/dotnet/Commands/Test/TestApplicationEventHandlers.cs

@@ -80,6 +80,7 @@ public void OnTestResultsReceived(object sender, TestResultEventArgs args)
                 args.InstanceId,
                 testResult.Uid,
                 testResult.DisplayName,
+                testResult.Reason,
                 ToOutcome(testResult.State),
                 TimeSpan.FromTicks(testResult.Duration ?? 0),
                 exceptions: null,
@@ -94,6 +95,7 @@ public void OnTestResultsReceived(object sender, TestResultEventArgs args)
             _output.TestCompleted(appInfo.ModulePath, appInfo.TargetFramework, appInfo.Architecture, appInfo.ExecutionId, args.InstanceId,
                 testResult.Uid,
                 testResult.DisplayName,
+                testResult.Reason,
                 ToOutcome(testResult.State),
                 TimeSpan.FromTicks(testResult.Duration ?? 0),
                 exceptions: [.. testResult.Exceptions.Select(fe => new Terminal.FlatException(fe.ErrorMessage, fe.ErrorType, fe.StackTrace))],