Dag only deploy option should not do secondary check

[collinmcnulty]

If a user is doing secondary manipulation of a filesystem to create a dags/ folder from multiple sources, the check on dags/ being changed in the diff will fail even though only dags have changed. This makes sense for infer, but we need to have an option where the user's indication that this is a dag-only deploy is trusted.

[neel-astro]

This change would start creating a problem when someone has configured multiple deploy action steps in their workflow, i.e. one for dbt deploy, another for dags deploy, and then one for image deploy.

In that case, as of now, we would only be triggering an image deploy for the case when there is a change outside the dags and dbt folder, but with this change, we would end up triggering both dags deploy and image deploy for such changes, which feels wrong.

Maybe having something like a skip-check parameter would be useful to skip these checks and simply do dag/dbt/image deploy if the deploy type is anything but infer. That would ensure existing workflow setups are not impacted.