Feature/data 2002 generalise jinja params

[siklosid]

DATA-2002

1. Adding new parameter to the module config generator, so now we can pass any number of json files to the generator, which will be accessible from the jinja template as parameters.
2. Enabling using airflow's task group feature which helps visually grouping airflow tasks on the airflow UI. This will make our test graph a little bit easier to navigate especially after we move the tasks into their respective marts.

[swarmia]

✅  Linked to Task DATA-2002 · Create tasks for all tests of each dbt model

[kiranvasudev]

lgtm !!

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[kiranvasudev]

lgtm 🎉