deprecate 2 breaking changes md files (#21277)

* deprecate 2 breaking changes md files

* update typing o to O

Author: YanaXu

documentation/breaking-changes/breaking-changes-attribute-help.md

@@ -1,3 +1,6 @@
+> **WARNING:**<br>
+> **This page is moved to [Breaking Changes Attribute Help](https://eng.ms/docs/cloud-ai-platform/azure-core/azure-management-and-platforms/control-plane-bburns/azure-cli-tools-azure-cli-powershell-and-terraform/azure-cli-tools/devguide/azps/breaking-change/breaking-changes-attribute-help). DO NOT UPDATE IT HERE!**<br>
+
 # Breaking Changes Attribute Help
 
 Below is description of the various types of Breaking Change Attributes (custom attributes) that can be used to decorate the cmdlet or its parameters to call out various [types of breaking changes](https://github.com/praries880/azure-powershell/blob/breakingchangeattribute/documentation/breaking-changes/breaking-changes-definition.md).

documentation/breaking-changes/breaking-changes-definition.md

@@ -1,3 +1,6 @@
+> **WARNING:**<br>
+> **This page is moved to [Breaking Change Definition](https://eng.ms/docs/cloud-ai-platform/azure-core/azure-management-and-platforms/control-plane-bburns/azure-cli-tools-azure-cli-powershell-and-terraform/azure-cli-tools/devguide/azps/breaking-change/breaking-changes-definition). DO NOT UPDATE IT HERE!**<br>
+
 # Breaking Change Definition
 
 This document lists the various types of breaking changes and how to call them out in your code using the [breaking change attributes](./breaking-changes-attribute-help.md).