Add PrivateAssets="All" to Microsoft.CodeCoverage

Author: RehanSaeed

Tests/Directory.Build.props

@@ -6,7 +6,7 @@
     <PackageReference Include="coverlet.collector" PrivateAssets="All" Version="3.0.3">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="Microsoft.CodeCoverage" Version="16.10.0" />
+    <PackageReference Include="Microsoft.CodeCoverage" PrivateAssets="All" Version="16.10.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.10.0" />
     <PackageReference Include="Microsoft.TestPlatform.ObjectModel" Version="16.10.0" />
     <PackageReference Include="Moq" Version="4.16.1" />