Turbopack: Allow client components from foreign code in app routes (#64751)
This extends #64520 to cover cases where client components originate
from node_modules (foreign code).
Test Plan: Extended the integration test to cover this
Closes #64412
Fixes PACK-3014
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Co-authored-by: OJ Kwon <1210596+kwonoj@users.noreply.github.com>