feat: lf_inherited_tags config to exclude certain tags from CRUD

[dacreify]

Description

See: #452

Acceptance Testing

1. Associate a tag with a database
2. Configure tag in dbt_project.yml, for example: +lf_inherited_tags: [my-tag] within models:
3. Add an lf_tags_config to a model to set some other tags
4. Run the model and observe that e.g. my-tag is retained instead of being removed and that additional model-level tags are associated

Checklist

• You followed contributing section
• You kept your Pull Request small and focused on a single feature or bug fix.
• You added unit testing when necessary
• You added functional testing when necessary

[nicor88]

Could you please fix the unit tests?

[dacreify]

@nicor88 Ok fixed and confirmed locally. Not sure why it's not re-running the failed checks.

[svdimchenko]

Overall the code looks OK to me with some minor adjustments. However I've left the comment in issue regarding this feature, I believe we should discuss it before proceesd with this PR.

[svdimchenko]

@dacreify could you please add models examples with corresponding configs to PR description, this will make testing process easier to reviewers

[dacreify]

@svdimchenko Sure added some testing steps -- see what you think

[svdimchenko]

@dacreify I've tested your changes and the feature works as expected. So let's fix the unit tests, also there are some minor comments and we are ready to go

[svdimchenko]

@nicor88 @Jrmyy would you like to take a look at this PR as well ?

[nicor88]

@dacreify great job. LGTM @svdimchenko

[dacreify]

Thanks all!