refactor e2e tests (#24385)

# Why

- Split out of https://github.com/expo/expo/pull/23911
- This PR also adds server tests for static rendering.
- Make it easier to run and test e2e metro code.

refactor e2e tests (#24385)

# Why

- Split out of https://github.com/expo/expo/pull/23911
- This PR also adds server tests for static rendering.
- Make it easier to run and test e2e metro code.
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# How

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# Test Plan

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# Checklist

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- [ ] Documentation is up to date to reflect these changes (eg:
https://docs.expo.dev and README.md).
- [ ] Conforms with the [Documentation Writing Style
Guide](https://github.com/expo/expo/blob/main/guides/Expo%20Documentation%20Writing%20Style%20Guide.md)
- [ ] This diff will work correctly for `npx expo prebuild` & EAS Build
(eg: updated a module plugin).

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Co-authored-by: Expo Bot <[email protected]>

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