Builds: avoid breaking builds when adding a new field to our APIs

[stsewd]

When adding a new field to our API, builds will immediately receive that new field, but our builders don't know about that new field yet, so creating an APIVersion or APIProject instance will fail

readthedocs.org/readthedocs/projects/tasks/builds.py

Line 802 in 60ffcb6

return APIProject(**project_data)

We could inspect the available fields from the model to create the object only with those fields, and maybe log the fields that aren't part of the model.

ref #10256

[humitos]

We could inspect the available fields from the model to create the object only with those fields, and maybe log the fields that aren't part of the model.

I like this idea. It will allow us to have both builders (old and new ones) at the same time while doing a deploy 👍🏼