Preparatory refactor for snapshot testing for #4794

[siddharthkp]

• Preparatory PR for https://github.com/primer/react/pull/4794

Refactored the snapshot test file to make it easier split by theme and feature flags. (Add new scenarios in the future)

Rollout strategy

• [ ] Patch release
• [ ] Minor release
• [ ] Major release; if selected, include a written rollout or migration plan
• [x] None; updates internal tests only

Testing & Reviewing

Merge checklist

• [x] Added/updated tests
• [ ] Added/updated documentation
• [ ] Added/updated previews (Storybook)
• [ ] Changes are SSR compatible
• [ ] Tested in Chrome
• [ ] Tested in Firefox
• [ ] Tested in Safari
• [ ] Tested in Edge
• [ ] (GitHub staff only) Integration tests pass at github/github (Learn more about how to run integration tests)

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Latest commit: 798008ed35e98d5364d6c0d913996b0305c94ca6

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[github-actions[bot]]

size-limit report 📦

Path	Size
packages/react/dist/browser.esm.js	96.34 KB (0%)
packages/react/dist/browser.umd.js	96.61 KB (0%)