action deploys stack even if 'no-execute-changeset' is set

[jvanmelckebeke]

Steps to Reproduce

1. Use the following GitHub Action configuration to deploy a CloudFormation stack:

   - name: deploy using CloudFormation
     uses: aws-actions/aws-cloudformation-github-deploy@master
     with:
       name: foobar
       template: template.yaml
       capabilities: ...
       no-execute-changeset: "1"
   

2. Ensure the CloudFormation stack does not exist before running the action.

3. The stack is deployed despite no-execute-changeset being set to "1".

Expected Behavior

A stack should be created, but with REVIEW_IN_PROGRESS.

Relevant Code

The issue appears to be in the deployStack function where the existence of the stack is checked. If the stack does not exist, a new stack is created without considering the no-execute-changeset flag. permalink