Make pglite compatible with @jest-environment: node

[samwillis]

Replaces #423

Thanks to @firelizzard18!

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Built bundles:

• Postgres WASM: https://github.com/electric-sql/pglite/actions/runs/11834754790/artifacts/2186714095
• Interim build files: https://github.com/electric-sql/pglite/actions/runs/11834754790/artifacts/2186714183
• PGlite: https://github.com/electric-sql/pglite/actions/runs/11834754790/artifacts/2186736680
• Demos: https://github.com/electric-sql/pglite/actions/runs/11834754790/artifacts/2186755372

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