Fix source build problem with missing intellisense xmls (#75985)

Co-authored-by: carlossanlop <1175054+carlossanlop@users.noreply.github.com>

Author: github-actions[bot]

Build.proj

@@ -10,7 +10,7 @@
   <Import Project="$(RepositoryEngineeringDir)SubsetValidation.targets" />
 
   <!-- Upfront restore hooks -->
-  <Import Project="$(RepositoryEngineeringDir)restore\docs.targets" Condition="'$(DotNetBuildFromSource)' != 'true'" />
+  <Import Project="$(RepositoryEngineeringDir)restore\docs.targets" />
   <Import Project="$(RepositoryEngineeringDir)restore\optimizationData.targets" Condition="'$(DotNetBuildFromSource)' != 'true'" />
 
   <Target Name="BuildLocalTasks"