Add always pass option

[nathanbarrett]

For teams where this step failing is not a critical failure. There have been many times in the past where this step has failed because of issues on Asana's end like the No Healthy Upstream failures. On large teams it's easy to start dismissing all action failures if you start ignoring one frequently. Setting this option to true for us will allow us to debug if attachments are not being made but reduce failure fatigue if Asana's API is failing.