Stop overwriting Arcade default MicrosoftTemplateEngineAuthoringTasksVersion (#66235)

Removed comments and updated MicrosoftNETTestSdkVersion.

Author: wtgodbe

eng/Versions.props

@@ -237,12 +237,6 @@
       framework in current .NET SDKs.
     -->
     <MicrosoftNETTestSdkVersion>17.1.0-preview-20211109-03</MicrosoftNETTestSdkVersion>
-    <!--
-      Also use a newer, publicly-released version of the templating engine than the Arcade default.
-      https://github.com/dotnet/templating/blob/main/docs/Localization.md recommends updating the version when
-      preview or stable versions are released to NuGet.org.
-    -->
-    <MicrosoftTemplateEngineAuthoringTasksVersion>8.0.100-alpha.1.22607.1</MicrosoftTemplateEngineAuthoringTasksVersion>
     <!--
       Versions of Microsoft.CodeAnalysis packages referenced by analyzers shipped in the SDK.
       This need to be pinned since they're used in 3.1 apps and need to be loadable in VS 2019.