Update AutoRest C# version to 3.0.0-beta.20210504.2 (#20851)
Update AutoRest C# version to 3.0.0-beta.20210504.2 (#20851)


AsrOneSdk/azure-sdk-for-net,jackmagic313/azure-sdk-for-net,jackmagic313/azure-sdk-for-net,AsrOneSdk/azure-sdk-for-net,AsrOneSdk/azure-sdk-for-net,AsrOneSdk/azure-sdk-for-net,jackmagic313/azure-sdk-for-net,jackmagic313/azure-sdk-for-net,jackmagic313/azure-sdk-for-net