Add support for "Path" select/exclude to DbtDag & DbtTaskGroup parsers

[chrishronek]

See dbt docs on cli usage examples here

$ dbt run --select path.to.my.models     # runs all models in a specific directory
$ dbt run --select path/to/models        # run models contained in path/to/models
$ dbt run --select path/to/my_model.sql  # run a specific model by its path

Ultimately, in our parsers, we should be able to have a new parameter that looks something like this:

# (only select or exclude parameter would be specified with staging dir not both)
jaffle_shop = DbtTaskGroup(
    ...
    select={"paths": ["../models/staging"]} # runs all models in the staging directory,
    exclude={"paths": ["../models/staging"]} # runs all models in except the staging directory
)

[chrishronek]

@jlaneve wanted to discuss the following:

How applicable is this? Isn't this already being done with the dbt_project_name parameter of the parsers? I can't imagine a use case where this is useful?

Jaffle Shop has a staging sub-directory in the project so we'll use that. Also MG gave a good use case of how to do this.