Only print evaluate requests in REPL context

This PR checks to see if the `-exec` commands are originally from the
REPL context (e.g. the Debug Console). If so, it will redirect the
output of the -exec command to the REPL window. If it is another
context, it will not print anything.

src/DebugEngineHost.Stub/Shared/Microsoft.VisualStudio.Debugger.Interop.DAP.cs

@@ -16,7 +16,11 @@ public enum DAPEvalFlags
         /// <summary>
         /// Evaluation is for a clipboard context
         /// </summary>
-        CLIPBOARD_CONTEXT = 1
+        CLIPBOARD_CONTEXT = 1,
+        /// <summary>
+        /// Evaluation is for repl context
+        /// </summary>
+        REPL = 2
     }
 
     /// <summary>

src/MIDebugEngine/Engine.Impl/Variables.cs

@@ -527,7 +527,7 @@ internal async Task Eval(uint radix, enum_EVALFLAGS dwFlags = 0, DAPEvalFlags dw
                     Value = String.Empty;
                     this.TypeName = null;
 
-                    if (!String.IsNullOrEmpty(consoleResults))
+                    if (!String.IsNullOrEmpty(consoleResults) && dwDAPFlags.HasFlag(DAPEvalFlags.REPL))
                     {
                         _debuggedProcess.WriteOutput(consoleResults);
                     }

src/OpenDebugAD7/AD7DebugSession.cs

@@ -2975,6 +2975,10 @@ protected override void HandleEvaluateRequestAsync(IRequestResponder<EvaluateArg
             {
                 dapEvalFlags |= DAPEvalFlags.CLIPBOARD_CONTEXT;
             }
+            else if (context == EvaluateArguments.ContextValue.Repl)
+            {
+                dapEvalFlags |= DAPEvalFlags.REPL;
+            }
 
             DEBUG_PROPERTY_INFO[] propertyInfo = new DEBUG_PROPERTY_INFO[1];
             enum_DEBUGPROP_INFO_FLAGS propertyInfoFlags = GetDefaultPropertyInfoFlags();