Remove the error on importing a json document in esm files in `moduleResolution: nodenext`

[weswigham]

As of today esm json module support is unflagged in node, which means our moduleResolution: nodenext target should probably no longer issue an error on it when resolveJsonModule is set. It's still appropriate to issue the error for node12, probably.

[aleclarson]

It's still appropriate to issue the error for node12, probably.

I'm using node12 resolution in a Vite project, which supports the Node.js resolution algorithm as well as JSON imports.