feat: add CloudWatch event rules and add missed CloudWatch log outputs

[SweetOps]

what

• add CloudWatch event rules
• add missed CloudWatch log outputs
• remove variable sns_subscriptions

why

• CloudWatch event rules are useful for invoking lambda by cron expressions
• CloudWatch log outputs are useful for external usage
• sns_subscriptions is unused variable

references

• Closes Example about cloudwatch_event_rules #27

[SweetOps]

/test all

[arichtman]

I would like to progress this change as we require the ability to add event rules for the Lambda and current version (v0.4.1) doesn't seem to actually do anything with the input var cloudwatch_event_rules

Is there something I can help with?

[sodre]

@SweetOps, same issue here. Did we close the issue by mistake before merging or is the approach to use a separate module to invoke the lambda function?