[Feature] regardless if the catalog query itself is pre-filtered or not, post-filter its results

[graciegoheen]

Is this your first time submitting a feature request?

• I have read the expectations for open source contributors
• I have searched the existing issues, and I could not find an existing issue for this feature
• I am requesting a straightforward extension of existing dbt functionality, rather than a Big Idea better suited to a discussion

Describe the feature

Originally from #9394

If I use a selector with dbt docs generate, I expect only the selected nodes to be returned in the catalog.json

Acceptance criteria

• regardless if the catalog query itself is pre-filtered or not, post-filter its results
• i.e., dbt docs generate -s a b c tag:one_hundred_models should only include those 103 models within catalog.json, even if there are 2000 models within the project.

[MichelleArk]

I ended up addressing this as part of #9755!

Tests here: https://github.com/dbt-labs/dbt-mantle/blob/main/tests/functional/docs/test_generate.py#L156