Make sure that v2 project yaml is supported by v2 deploy

[josephjclark]

Make sure that the v2 deploy function works well from a single spec file

So rather than deploying what's expanded on the filesystem, we can deploy from a single spec file.

If the repo already has a project state yaml file, it should use this to find the endpoint and stuff. I guess precedence is:

• accept endpoint and project id from args
• load endpoint and project id from alias or UUID (works if this isn't the first deploy)
• load endpoint and project id from openfn.yaml (maybe? feels a bit loose?)
• accept endpoint and project id from env

v1 deploy should not work with the v2 format. We should probably add a nice error