fix(@expo/config-plugins): fix typings for removed jsEngine config type property (expo#44651)

# Why

Related expo#44542
Related expo#44569
Related expo#44576

The update removes the previously deprecated `jsEngine` property.

# How

Removes `jsEngine` type references, since this has been removed from
`@expo/config-types`.

Not adding a changelog entry, since none of these changes are
user-facing.

# Test Plan

CI

# Checklist

- [ ] I added a `changelog.md` entry and rebuilt the package sources
according to [this short
guide](https://github.com/expo/expo/blob/main/CONTRIBUTING.md#-before-submitting)
- [x] This diff will work correctly for `npx expo prebuild` & EAS Build
(eg: updated a module plugin).
- [ ] Conforms with the [Documentation Writing Style
Guide](https://github.com/expo/expo/blob/main/guides/Expo%20Documentation%20Writing%20Style%20Guide.md)

Author: hassankhan