Move public interface ISymDocumentWriter to shared location (#21931)

Signed-off-by: dotnet-bot <[email protected]>

netcore/System.Private.CoreLib/shared/System.Private.CoreLib.Shared.projitems

@@ -200,6 +200,7 @@
     <Compile Include="$(MSBuildThisFileDirectory)System\Diagnostics\StackFrame.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)System\Diagnostics\StackTrace.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)System\Diagnostics\StackTraceHiddenAttribute.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)System\Diagnostics\SymbolStore\ISymbolDocumentWriter.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)System\DivideByZeroException.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)System\DllNotFoundException.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)System\Double.cs" />

netcore/System.Private.CoreLib/shared/System/Diagnostics/SymbolStore/ISymbolDocumentWriter.cs

@@ -0,0 +1,12 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+namespace System.Diagnostics.SymbolStore
+{
+    public interface ISymbolDocumentWriter
+    {
+        void SetCheckSum(Guid algorithmId, byte[] checkSum);
+        void SetSource(byte[] source);
+    }
+}