Update MSBuild versions to latest (#15843)

Author: NikolaMilosavljevic

eng/Version.Details.xml

@@ -160,9 +160,9 @@
       <SourceBuild RepoName="source-build-externals" ManagedOnly="true" />
     </Dependency>
     <!-- Intermediate is necessary for source build. -->
-    <Dependency Name="Microsoft.SourceBuild.Intermediate.source-build-reference-packages" Version="9.0.0-alpha.1.24619.1">
+    <Dependency Name="Microsoft.SourceBuild.Intermediate.source-build-reference-packages" Version="9.0.0-alpha.1.25266.1">
       <Uri>https://github.com/dotnet/source-build-reference-packages</Uri>
-      <Sha>e2b1d16fd66540b3a5813ec0ac1fd166688c3e0a</Sha>
+      <Sha>2bdf6b694572c45f6249c5406ae2303d678cda3f</Sha>
       <SourceBuild RepoName="source-build-reference-packages" ManagedOnly="true" />
     </Dependency>
     <!-- Transitive dependency needed for source build. -->

eng/Versions.props

@@ -26,10 +26,10 @@
     <MicrosoftSymbolUploaderBuildTaskVersion>2.0.0-preview.1.23470.14</MicrosoftSymbolUploaderBuildTaskVersion>
     <MicrosoftSymbolUploaderVersion>2.0.0-preview.1.23470.14</MicrosoftSymbolUploaderVersion>
     <!-- msbuild -->
-    <MicrosoftBuildFrameworkVersion>17.8.3</MicrosoftBuildFrameworkVersion>
-    <MicrosoftBuildTasksCoreVersion>17.8.3</MicrosoftBuildTasksCoreVersion>
-    <MicrosoftBuildUtilitiesCoreVersion>17.8.3</MicrosoftBuildUtilitiesCoreVersion>
-    <MicrosoftBuildVersion>17.8.3</MicrosoftBuildVersion>
+    <MicrosoftBuildFrameworkVersion>17.8.29</MicrosoftBuildFrameworkVersion>
+    <MicrosoftBuildTasksCoreVersion>17.8.29</MicrosoftBuildTasksCoreVersion>
+    <MicrosoftBuildUtilitiesCoreVersion>17.8.29</MicrosoftBuildUtilitiesCoreVersion>
+    <MicrosoftBuildVersion>17.8.29</MicrosoftBuildVersion>
     <!-- netstandard -->
     <NETStandardLibraryVersion>2.0.3</NETStandardLibraryVersion>
     <!-- nuget -->