[breaking changes tracker] Refactor messages to support changelog reporting

[catalinaperalta]

Refactor messages for breaking changes reporting so that they can also be formatted appropriately for changelog reporting. Keep the message simple to reuse for both changelog and breaking change reporting. During breaking change reporting add change code to the string.

Current output example:
(RemovedOrRenamedClient) The client azure.foo.FooClient was deleted or renamed in the current version"

Expected output example:
The client azure.foo.FooClient was deleted or renamed in the current version