Ignore V1 elements in the inabox resource manager

[dvoytenko]

Partial for #31915.

This is a complete symmetry with the main Resources manager. See #32568 for more details.

[jridgewell]

I actually think we should leave this alone?

[dvoytenko]

I actually think we should leave this alone?

Ideally it'd work the same way in the inabox. But the main danger this avoids: V1 shouldn't have their layoutCallback called. I can work it around in the CustomElement (e.g. layoutCallback() { if (V1) return Promise.resolve(); ...}. But then why even call it?

[jridgewell]

Ahh, ok.