Revert "Turn off static graph restore. (#8498)"

This reverts commit 7c4d75dca8.

eng/Build.props

@@ -2,13 +2,9 @@
 <!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the MIT license. See License.txt in the project root for full license information. -->
 <Project>
 
-<!-- Commented out as a temporary fix for the msbuild CI.
-Waiting for https://github.com/NuGet/NuGet.Client/pull/5010 fix to flow to CI machines. -->
-<!--
   <PropertyGroup>
     <RestoreUseStaticGraphEvaluation Condition="'$(DotNetBuildFromSource)' != 'true'">true</RestoreUseStaticGraphEvaluation>
   </PropertyGroup>
--->
 
   <ItemGroup>
 	<!-- Remove all sln files globbed by arcade so far and add only MSBuild.sln to the build.