Disable SslStream_UntrustedCaWithCustomCallback_* on OSX (#47025)

Author: hoyosjs

src/libraries/System.Net.Security/tests/FunctionalTests/SslStreamNetworkStreamTest.cs

@@ -216,6 +216,7 @@ await TestConfiguration.WhenAllOrAnyFailedWithTimeout(
         [Theory]
         [InlineData(true)]
         [InlineData(false)]
+        [ActiveIssue("https://github.com/dotnet/runtime/issues/46837", TestPlatforms.OSX)]
         public async Task SslStream_UntrustedCaWithCustomCallback_OK(bool usePartialChain)
         {
             var rnd = new Random();
@@ -279,6 +280,7 @@ public async Task SslStream_UntrustedCaWithCustomCallback_OK(bool usePartialChai
         [PlatformSpecific(TestPlatforms.AnyUnix)]
         [InlineData(true)]
         [InlineData(false)]
+        [ActiveIssue("https://github.com/dotnet/runtime/issues/46837", TestPlatforms.OSX)]
         public async Task SslStream_UntrustedCaWithCustomCallback_Throws(bool customCallback)
         {
             string errorMessage;