Fix framework package validation build (#32562)

When using AfterTargets="Build" msbuild does not let a failing target effect the result
of the called target (build) since the called target and its closure did not fail.

Instead, sequence our targets in the closure of "Build" so that a failing target will
propagate to the build result.

pkg/frameworkPackage.targets

@@ -109,7 +109,7 @@
 
   <Target Name="VerifyClosure"
           DependsOnTargets="GetClosureFiles"
-          AfterTargets="Build"
+          AfterTargets="ValidatePackage"
           Inputs="%(ClosureFile.FileSet)"
           Outputs="batching-on-FileSet-metadata">
     <ItemGroup>
@@ -129,7 +129,7 @@
 
   <Target Name="VerifyDuplicateTypes"
           DependsOnTargets="GetClosureFiles"
-          AfterTargets="Build"
+          AfterTargets="ValidatePackage"
           Inputs="%(ClosureFile.FileSet)"
           Outputs="batching-on-FileSet-metadata">
     <PropertyGroup>
@@ -154,7 +154,7 @@
 
   <Target Name="VerifyNETStandard"
           DependsOnTargets="GetClosureFiles"
-          AfterTargets="Build"
+          AfterTargets="ValidatePackage"
           Inputs="%(ClosureFile.FileSet)"
           Outputs="batching-on-FileSet-metadata">