test-paths should default to "tests" not "test"

[jpeak-intellify]

Describe the bug

dbt init sets up the dbt_project.yml with some default paths.
I wanted to cleanup my dbt_project.yml by removing these assuming I used the default values and folder names.

Turns out the default value for test-paths is test-paths: ["test"].
Where as the default that dbt init creates is test-paths: ["tests"].

This seems inconsistent.

https://docs.getdbt.com/reference/project-configs/test-paths

Could the default value be:
A) Changed to look for "tests" so it matches dbt init OR
B) Change the default value to look for both "test" and "tests".

It is nice that dbt init makes these visible initially to let me know what is available.

However if I don't change these from the defaults I would like to declutter my dbt_project.yml and remove them and have consistent behaviour.

I haven't double checked seeds, snapshots, etc.

[jtcohen6]

@jpeak-intellify Agreed!! You have great timing. We just opened a PR to finally fix this, in the lead-up to v1.0: #4007

In the meantime, I'm going to close this as a dupe of the original issue (#2659)