Bot Connection API shouldn't update the tags of Bot Channel Registration resource

After tested, we found [Bot Connection API](https://github.com/Azure/azure-rest-api-specs/blob/main/specification/botservice/resource-manager/Microsoft.BotService/stable/2021-03-01/botservice.json#L866) would retrieve/update the tags of [Bot Channel Registration resource](https://github.com/Azure/azure-rest-api-specs/blob/274ce070dd54fa454d91a4b4740904afa6a6e45d/specification/botservice/resource-manager/Microsoft.BotService/stable/2021-03-01/botservice.json#L1243). I assume Bot Connection API should update the tags of Bot Connection resource or Bot Connection API doesn't support tags. So seems it's a bug here.

Start with the linked botservice.json operation around line 866 and the Bot Channel Registration resource around line 1243. Compare the Bot Connection API's tag handling with the relevant resource definition and confirm whether tags belong to Bot Connection or are unsupported. Done means the specification no longer assigns tag retrieval or updates to the wrong resource.

Written by the indexing model from the issue text.