Add test to verify Lit works in SSR

[matthewp]

Changes

• No changes, this already worked
• Closes 🐛 BUG: Window is not defined after using lit integration when deployed on netlify #3126

Testing

• Added a test to verify that Lit works in SSR, and it does.

Docs

N/A

[changeset-bot]

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Latest commit: b0bea49

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