[Redis] Adding Managed Identity support (Azure#25973)

* generated code using redis 2021-06

* New tests and old test modification

* adding and updating test records

* updating sdk version

* updating resource-manager and RP.props

Co-authored-by: Praveenkumar Ravikumar <prravikumar@microsoft.com>

Author: gorandom

eng/mgmt/mgmtmetadata/redis_resource-manager.txt

@@ -3,13 +3,13 @@ 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/master/specification/redis/resource-manager/readme.md --csharp --version=v2 --reflect-api-versions --csharp-sdks-folder=E:\azure-sdk-for-net\sdk
+cmd.exe /c autorest.cmd https://github.com/Azure/azure-rest-api-specs/blob/main/specification/redis/resource-manager/readme.md --csharp --version=v2 --reflect-api-versions --csharp-sdks-folder=C:\azure-sdk-for-net\sdk
 Autorest CSharp Version: 2.3.82
-2021-07-23 02:20:34 UTC
+2021-12-15 11:49:06 UTC
 Azure-rest-api-specs repository information
 GitHub fork: Azure
-Branch:      master
-Commit:      b20011746ef065a8ab6572045de9578c192f2ffd
+Branch:      main
+Commit:      58891380ba22c3565ca884dee3831445f638b545
 AutoRest information
 Requested version: v2
-Bootstrapper version:    autorest@2.0.4413
+Bootstrapper version:    autorest@3.3.2

sdk/redis/Microsoft.Azure.Management.Redis/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>Cache_2020-12-01;</AzureApiTag>
+    <AzureApiTag>Cache_2021-06-01;</AzureApiTag>
     <PackageTags>$(PackageTags);$(CommonTags);$(AzureApiTag);</PackageTags>
   </PropertyGroup>
 </Project>