Modifying the reporting channels to make the AdapterChannel a client and leave the TestRunnerChannel a server. This will prevent port conflicts between dotnet test and the Adapter (VS) due to race conditions.

Added E2E tests for dotnet test interactions with an adapter (design time).

test/dotnet-test.UnitTests/GivenATestExecutionGetTestRunnerProcessStartInfoMessageHandler.cs

@@ -161,7 +161,7 @@ namespace Microsoft.Dotnet.Tools.Test.Tests
                     _dotnetTestMock.Object,
                     _validMessage);
 
-            _testRunnerChannelMock.Verify(t => t.Accept(), Times.Once);
+            _testRunnerChannelMock.Verify(t => t.Connect(), Times.Once);
         }
 
         [Fact]