Fix DisableWorkloadResolverSentinelPath on .NET Framework (#40787)

As pointed out in dotnet/msbuild#10118, we currently look for the file in arch subfolders such as `MSBuild\Current\Bin\amd64\SdkResolvers`), which doesn't look expected. `SdkResolvers` is present only under the base (x86) installation path.

Author: ladipro

src/Tasks/Microsoft.NET.Build.Tasks/targets/Microsoft.NET.Sdk.props

@@ -141,7 +141,7 @@ Copyright (c) .NET Foundation. All rights reserved.
        putting an EnableWorkloadResolver.sentinel file beside the MSBuild SDK resolver DLL -->
   <PropertyGroup Condition="'$(MSBuildEnableWorkloadResolver)' == ''">
     <__DisableWorkloadResolverSentinelPath Condition="'$(MSBuildRuntimeType)' == 'Core'">$(MSBuildBinPath)\DisableWorkloadResolver.sentinel</__DisableWorkloadResolverSentinelPath>
-    <__DisableWorkloadResolverSentinelPath Condition="'$(MSBuildRuntimeType)' != 'Core'">$(MSBuildBinPath)\SdkResolvers\Microsoft.DotNet.MSBuildSdkResolver\DisableWorkloadResolver.sentinel</__DisableWorkloadResolverSentinelPath>
+    <__DisableWorkloadResolverSentinelPath Condition="'$(MSBuildRuntimeType)' != 'Core'">$(MSBuildToolsPath32)\SdkResolvers\Microsoft.DotNet.MSBuildSdkResolver\DisableWorkloadResolver.sentinel</__DisableWorkloadResolverSentinelPath>
     <MSBuildEnableWorkloadResolver Condition="!Exists('$(__DisableWorkloadResolverSentinelPath)')">true</MSBuildEnableWorkloadResolver>
   </PropertyGroup>