Update Conditions for all .NetCore

Author: H-Yeo

src/Microsoft.Data.SqlClient/netcore/ref/Microsoft.Data.SqlClient.csproj

@@ -16,7 +16,7 @@
     <Compile Include="Microsoft.Data.SqlClient.cs" />
     <Compile Include="Microsoft.Data.SqlClient.Manual.cs" />
   </ItemGroup>
-  <ItemGroup Condition="$([MSBuild]::IsTargetFrameworkCompatible('$(TargetFramework)', 'net6.0'))">
+  <ItemGroup Condition="'$([MSBuild]::GetTargetFrameworkIdentifier($(TargetFramework)))'=='.NETCoreApp'">
     <Compile Include="..\..\ref\Microsoft.Data.SqlClient.Batch.cs" />
     <Compile Include="..\..\ref\Microsoft.Data.SqlClient.Batch.NetCoreApp.cs" />
   </ItemGroup>