Add binding redirects for all assemblies redistributed by MSBuild (#6334

)

MSBuild redistributes System.Memory but does not binding redirect it. This causes the QB cache plugin to fail (qb.exe works because it has binding redirects, but the plugin fails because it's a dll and dlls don't have binding redirects).
Both MSBuild and VS ship with System.Memory 4.0.1.1 so this should not have any negative consequences.

src/MSBuild/app.amd64.config

@@ -69,6 +69,23 @@
           <bindingRedirect oldVersion="0.0.0.0-4.0.3.0" newVersion="4.0.3.0" />
         </dependentAssembly>
 
+        <!-- Redirects for assemblies redistributed by MSBuild (in the .vsix). -->
+        <dependentAssembly>
+          <assemblyIdentity name="Microsoft.Bcl.AsyncInterfaces" publicKeyToken="cc7b13ffcd2ddd51" culture="neutral" />
+          <bindingRedirect oldVersion="0.0.0.0-1.0.0.0" newVersion="1.0.0.0" />
+        </dependentAssembly>
+        <dependentAssembly>
+          <assemblyIdentity name="Microsoft.NET.StringTools" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
+          <bindingRedirect oldVersion="0.0.0.0-1.0.0.0" newVersion="1.0.0.0" />
+        </dependentAssembly>
+        <dependentAssembly>
+          <assemblyIdentity name="Microsoft.NET.StringTools.net35" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
+          <bindingRedirect oldVersion="0.0.0.0-1.0.0.0" newVersion="1.0.0.0" />
+        </dependentAssembly>
+        <dependentAssembly>
+          <assemblyIdentity name="System.Buffers" publicKeyToken="cc7b13ffcd2ddd51" culture="neutral" />
+          <bindingRedirect oldVersion="0.0.0.0-4.0.3.0" newVersion="4.0.3.0" />
+        </dependentAssembly>
         <!-- Pull plugins that reference SCI up to our version in case they depended on our copy of the older version -->
         <dependentAssembly>
           <assemblyIdentity name="System.Collections.Immutable" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />