Storybook changes trigger

Storybook changes trigger

Trigger files: storybook/**/*.stories.js, storybook/config.js

Pattern chain:

storybook/stories/Button.stories.js → code-patterns ({,ee/,jh/}storybook/**/*) → full test suite

Storybook is an isolated component documentation environment. Changes to stories should only trigger compile-storybook and frontend linting — not rspec or backend jobs.

Proposed fix: Remove {,ee/,jh/}storybook/**/* from code-patterns. Add it to frontend-code-patterns instead, so it triggers frontend jobs only.

Example pipeline https://gitlab.com/gitlab-org/gitlab/-/pipelines/2003777039