fix: deploy server assets

[benmccann]

closes #5240

[dummdidumm]

Since you said this is Vite 4.1 related - is this backwards compatible?

[Conduitry]

We've had a note in the past indicating that a given release only fixed a bug if you are using Vite 4.1+, which I think is a fine thing to do, but we should mention that in the changeset if that's the case.

We should also make sure that this doesn't actually break anything for people still on Vite 4.0. That will probably be a manual process, because we don't currently have a good way to do that in CI.

[benmccann]

Yes, the changeset does mention Vite 4.1

I upgraded Vite to 4.1 in this PR in order to get the type for the ssrEmitAssets option as it would complain about an unknown option otherwise. But I reverted the last commit locally and ran the tests against Vite 4.0 and they all passed still