In our Astro-4 E2E test app, Astro's Node adapter was pinned to a bad
version that didn'T work correctly with newer Astro versions. We pinned
the Astro version a while ago in
#14030 to unblock CI
but looks like we just didn't follow up with investigating what caused
the issue back then.

This came up again when dependabot tried to bump the Astro version in
#14781 and #14807 and as a result #14808 was opened.

This PR now 
- bumps the Node adapter version which makes newer Astro version
function properly again
- updates `astro` to the latest v4 version (which is why I closed
#14807)

closes #14808