Draft: Inherit user metadata to lint factories example groups

What does this MR do and why?

Since we create an isolated, detached, top-level example group to lint factories per model, metadata is not inherited.

However, some model specs need special setup like :saas or :with_license tags which are usually set on the model's example group.

We now also inherit feature_category tags!

Let's inherit these user metadata. This way we don't need to pass :saas and :with_license tags for all factory lints.

This might reduce flaky specs: #478114 (closed)

MR acceptance checklist

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How to set up and validate locally

1. Run bin/rspec --seed 19390 './spec/models/draft_note_spec.rb[1:2:4:1:2]' './spec/lib/banzai/filter/references/design_reference_filter_spec.rb[1:7:1:1,1:7:2:1,1:7:3:1,1:7:4:1,1:10:2:1,1:11:1,1:12:2:1,1:12:5,1:12:6]' --format documentation ✅
2. Run bin/rspec ee/spec/models/gitlab_subscription_spec.rb -E 'Lint factories for.*gitlab_subscription'