Don't start proxy in live mode (Azure#25697)

* Don't start proxy in live mode

* move digital twins to legacy transport temporarily

* Add back legacy uri sanitizer

Author: JoshLove-msft

sdk/core/Azure.Core.TestFramework/src/RecordedTestBase.cs

@@ -154,7 +154,7 @@ public void InitializeRecordedTestClass()
                 Logger = new TestLogger();
             }
 
-            if (!_useLegacyTransport)
+            if (!_useLegacyTransport && Mode != RecordedTestMode.Live)
             {
                 _proxy = TestProxy.Start();
             }

sdk/digitaltwins/Azure.DigitalTwins.Core/tests/E2eTestBase.cs

@@ -23,7 +23,7 @@ public abstract class E2eTestBase : RecordedTestBase<DigitalTwinsTestEnvironment
         protected static readonly int MaxIdLength = 27;
 
         public E2eTestBase(bool isAsync)
-         : base(isAsync, TestSettings.Instance.TestMode)
+         : base(isAsync, TestSettings.Instance.TestMode, useLegacyTransport: true)
         {
             Sanitizer = new TestUrlSanitizer();
         }

sdk/digitaltwins/Azure.DigitalTwins.Core/tests/TestUrlSanitizer.cs

@@ -9,6 +9,9 @@ namespace Azure.DigitalTwins.Core.Tests
 {
     internal class TestUrlSanitizer : RecordedTestSanitizer
     {
+        internal const string FAKE_URL = "https://fakeHost.api.wus2.digitaltwins.azure.net";
+        internal const string FAKE_HOST = "fakeHost.api.wus2.digitaltwins.azure.net";
+
         public TestUrlSanitizer()
         {
             UriRegexSanitizers.Add(
@@ -18,7 +21,9 @@ public TestUrlSanitizer()
                 });
         }
 
-        internal const string FAKE_URL = "https://fakeHost.api.wus2.digitaltwins.azure.net";
-        internal const string FAKE_HOST = "fakeHost.api.wus2.digitaltwins.azure.net";
+        public override string SanitizeUri(string uri)
+        {
+            return uri.Replace(new Uri(uri).Host, FAKE_HOST);
+        }
     }
 }