update labservices sdk and tests for 2021-10-01-preview version (Azure#24649)

Co-authored-by: Nick Depinet <ndepinet@microsoft.com>

Author: nickdepinet

eng/mgmt/mgmtmetadata/labservices_resource-manager.txt

@@ -0,0 +1,15 @@
+Installing AutoRest version: v2
+AutoRest installed successfully.
+Commencing code generation
+Generating CSharp code
+Executing AutoRest command
+cmd.exe /c autorest.cmd https://github.com/Azure/azure-rest-api-specs/blob/main/specification/labservices/resource-manager/readme.md --csharp --version=v2 --reflect-api-versions --csharp-sdks-folder=C:\Repos\azure-sdk-for-net\sdk
+Autorest CSharp Version: 2.3.91
+2021-10-07 21:23:32 UTC
+Azure-rest-api-specs repository information
+GitHub fork: Azure
+Branch:      main
+Commit:      2ebe584103a362fa87f2f60c9bab89ab410c7571
+AutoRest information
+Requested version: v2
+Bootstrapper version:    autorest@3.4.0

sdk/labservices/Microsoft.Azure.Management.LabServices/AzSdk.RP.props

@@ -1,7 +1,7 @@
 <Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <!--This file and it's contents are updated at build time moving or editing might result in build failure. Take due deligence while editing this file-->
   <PropertyGroup>
-    <AzureApiTag>LabServices_2018-10-15;</AzureApiTag>
+    <AzureApiTag>LabServices_2021-10-01-preview;</AzureApiTag>
     <PackageTags>$(PackageTags);$(CommonTags);$(AzureApiTag);</PackageTags>
   </PropertyGroup>
 </Project>