[CT-2517] Graph selection for public models from dependency projects

[MichelleArk]

Currently dbt ls does not include any models from publication artifacts (dependency projects). Should it? My inclination would be to output public model dependencies the same way that models from installed packages output.

E.g, a project with project_a.public_model available s a dependency:

❯ dbt ls
14:43:02  Running with dbt=1.6.0-a1
14:43:02  target not specified in profile 'postgres', using 'default'
14:43:02  Found 2 models, 0 tests, 0 snapshots, 0 analyses, 307 macros, 0 operations, 0 seed files, 2 sources, 0 exposures, 0 metrics, 0 groups
consumer_project.cross_project_ref
consumer_project.model
source:consumer_project.jaffle_shop.customers
source:consumer_project.jaffle_shop.orders

[jtcohen6]

dbt ls should include upstream public models.

Let's make sure the JSON output of dbt ls has some sort of attribute to distinguish this as an upstream public model. (It will have the package_name which differs from the current project name, but wouldn't necessarily distinguish it from models from packages / installed as source code.)

For dbt ls with text output, this will just look like:

upstream_project.public_model