port: (dotnet) Remove comments pertaining to auto-generation in Schema and Connector (#5002)

[github-actions]

The changes in (dotnet) Remove comments pertaining to auto-generation in Schema and Connector (#5002) may need to be ported to maintain parity with microsoft/botbuilder-dotnet.

Fixes #4946 Partially fixes [bf-sdk issue#5887](https://github.com/microsoft/botframework-sdk/issues/5887)

Description

Files in Microsoft.Bot.Connector and Microsoft.Bot.Schema are no longer auto-generated from Swagger, however most files still contain // <auto-generated> comments. This PR:

• Removes "auto-generated" comments in Connector and Schema
  • Replace comment with standard Copyright header

  // Copyright (c) Microsoft Corporation. All rights reserved.
  // Licensed under the MIT License.
  

• Removes misleading Generated folder in Microsoft.Bot.Schema/Teams/
  • Files in this subfolder moved to be under Teams/ folder directly

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Update: This PR also corrects 1800+ styling errors that were hidden previously when the files were considered "auto-generated", but now had unearthed themselves for a great big surprise Christmas present to me 😵 ✨ 🎉 😅 🎁

Please review and, if necessary, port the changes.

[Zerryth]

Taken care of in #1464