Allow extension to sns topic created for the alarm

[nacholupotti]

Start from the Use-case

The Serverless Lift plugin currently doesn't support modifications for the SNS topic associated with the alarm (correct me if I am wrong here).
Its possible to make extensions to the alarm, but not to the SNS topic that the alarm property creates.

I would like to configure the SNS topic. In my use case, is to avoid the creation of the topic in certain environments.

Example Config

extensions:
queue:
Properties:
QueueName: queueName1
dlq:
Properties:
QueueName: queueName2
alarm:
topic:
Topic cloudformation configuration here

Implementation Idea

No response