Disable workload resolver until we support it (#53226)

Unblock Preview 4 SDK usage in the repo.

Directory.Build.props

@@ -209,6 +209,8 @@
     <RestoreUseStaticGraphEvaluation>true</RestoreUseStaticGraphEvaluation>
     <!-- Turn off end of life target framework checks as we intentionally build older .NETCoreApp configurations. -->
     <CheckEolTargetFramework>false</CheckEolTargetFramework>
+    <!-- Turn off workload support until we support them. -->
+    <MSBuildEnableWorkloadResolver>false</MSBuildEnableWorkloadResolver>
     <!-- Disable source link when building locally. -->
     <DisableSourceLink Condition="'$(DisableSourceLink)' == '' and
                                   '$(ContinuousIntegrationBuild)' != 'true' and