Skip tests that depended on portable provider

src/Compilers/CSharp/Test/CommandLine/CommandLineTests.cs

@@ -5826,7 +5826,7 @@ public void EmittedSubsystemVersion()
             Assert.Equal(1, peHeaders.PEHeader.MinorSubsystemVersion);
         }
 
-        [Fact]
+        [Fact(Skip = "https://github.com/dotnet/roslyn/pull/23529")]
         public void CreateCompilationWithKeyFile()
         {
             string source = @"

src/Compilers/VisualBasic/Test/CommandLine/CommandLineTests.vb

@@ -107,7 +107,7 @@ End Module
             Assert.Equal("", output.ToString().Trim())
         End Sub
 
-        <Fact>
+        <Fact(Skip = "https://github.com/dotnet/roslyn/pull/23529")>
         Public Sub CreateCompilationWithKeyFile()
             Dim source = "
 Public Class C