remove instrumentation and move unreliable tests to Outerloop (#35113)

Author: wfurt

src/System.Net.NameResolution/tests/PalTests/NameResolutionPalTests.cs

@@ -36,6 +36,7 @@ public void TryGetAddrInfo_LocalHost()
         }
 
         [Fact]
+        [OuterLoop("Uses external server")]
         public void TryGetAddrInfo_HostName()
         {
             string hostName = NameResolutionPal.GetHostName();
@@ -51,16 +52,6 @@ public void TryGetAddrInfo_HostName()
                 return;
             }
 
-            // Temporary instrumentation for #32797
-            if (error == SocketError.TryAgain && Environment.OSVersion.Platform == PlatformID.Unix)
-            {
-                error = NameResolutionPal.TryGetAddrInfo(hostName, out hostEntry, out nativeErrorCode);
-                if (error != SocketError.TryAgain)
-                {
-                    throw new InvalidOperationException("Name resolution failure preventable with retry");
-                }
-            }
-
             Assert.Equal(SocketError.Success, error);
             Assert.NotNull(hostEntry);
             Assert.NotNull(hostEntry.HostName);
@@ -103,6 +94,7 @@ public void TryGetAddrInfo_LocalHost_TryGetNameInfo()
         }
 
         [Fact]
+        [OuterLoop("Uses external server")]
         public void TryGetAddrInfo_HostName_TryGetNameInfo()
         {
             string hostName = NameResolutionPal.GetHostName();
@@ -119,16 +111,6 @@ public void TryGetAddrInfo_HostName_TryGetNameInfo()
                 return;
             }
 
-            // Temporary instrumentation for #32797
-            if (error == SocketError.TryAgain && Environment.OSVersion.Platform == PlatformID.Unix)
-            {
-                error = NameResolutionPal.TryGetAddrInfo(hostName, out hostEntry, out nativeErrorCode);
-                if (error != SocketError.TryAgain)
-                {
-                    throw new InvalidOperationException("Name resolution failure preventable with retry");
-                }
-            }
-
             Assert.Equal(SocketError.Success, error);
             Assert.NotNull(hostEntry);