Add target to remove inner .globalconfig file

Author: ViktorHofer

eng/DotNetBuild.props

@@ -7,6 +7,20 @@
     <SourceBuildManagedOnly>true</SourceBuildManagedOnly>
   </PropertyGroup>
 
+  <!--
+    Remove inner source .globalconfig file as both the inner and outer config files get loaded and cause a conflict.
+    Leaving the inner will cause all conflicting settings to be ignored.
+    https://learn.microsoft.com/dotnet/fundamentals/code-analysis/configuration-files#general-options.
+    This only needs to be done if there is an inner clone.
+  -->
+  <Target Name="RemoveInnerGlobalConfig"
+          DependsOnTargets="PrepareInnerSourceBuildRepoRoot"
+          BeforeTargets="RunInnerSourceBuildCommand"
+          Condition="'$(DotNetBuildOrchestrator)' != 'true'">
+
+    <Delete Files="$(InnerSourceBuildRepoRoot).globalconfig" />
+  </Target>
+
   <!-- Build RepoTasks - this is normally triggered via the build script but the inner ArPow source-build is run via msbuild.
        https://github.com/dotnet/source-build/issues/3807 -->
   <Target Name="BuildRepoTasks"