Fix .NET 6 compatibility and update condition to include empty RuntimeIdentifier

Co-authored-by: kirankumarkolli <6880899+kirankumarkolli@users.noreply.github.com>

Author: Copilot

Microsoft.Azure.Cosmos/src/Microsoft.Azure.Cosmos.targets

@@ -1,10 +1,10 @@
 <Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
 
   <!-- Only include Windows native DLLs when:
-       1. A RuntimeIdentifier is specified (not a regular build)
-       2. AND it's a Windows RuntimeIdentifier
+       1. RuntimeIdentifier is empty (regular build without RID), OR
+       2. RuntimeIdentifier is specified AND starts with 'win'
   -->
-  <ItemGroup Condition="'$(RuntimeIdentifier)' != '' AND $(RuntimeIdentifier.StartsWith('win'))">
+  <ItemGroup Condition="'$(RuntimeIdentifier)' == '' OR $(RuntimeIdentifier.StartsWith('win'))">
     <ContentWithTargetPath Include="$(MSBuildThisFileDirectory)..\..\runtimes\win-x64\native\Microsoft.Azure.Cosmos.ServiceInterop.dll">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
       <TargetPath>Microsoft.Azure.Cosmos.ServiceInterop.dll</TargetPath>

Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.Tests/MSBuild/CosmosTargetsPublishTests.cs

@@ -185,7 +185,8 @@ private string PublishProject(string projectFile, string runtimeIdentifier)
 
             using (var process = Process.Start(processInfo))
             {
-                process.WaitForExit(TimeSpan.FromMinutes(5).Milliseconds);
+                // .NET 6 compatibility: WaitForExit doesn't support TimeSpan parameter
+                process.WaitForExit((int)TimeSpan.FromMinutes(5).TotalMilliseconds);
 
                 string output = process.StandardOutput.ReadToEnd();
                 string error = process.StandardError.ReadToEnd();