fix(tests): Update integration tests to test against the new --on-failure exit code

[lucashuy]

Which issue(s) does this change fix?

None.

Why is this change necessary?

Recent change was made to --on-failure's behaviour so that the exit code represents the status of the deployment, not the status of command execution. This causes the integration tests to fail since they were not updated.

How does it address the issue?

Updates our tests to check for exit code 1 for the command runs that attempt to deploy a broken stack.

What side effects does this change have?

None.

Mandatory Checklist

PRs will only be reviewed after checklist is complete

• Add input/output type hints to new functions/methods
• Write design document if needed (Do I need to write a design document?)
• Write/update unit tests
• Write/update integration tests
• Write/update functional tests if needed
• make pr passes
• make update-reproducible-reqs if dependencies were changed
• Write documentation

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.