Refactor the Kotlin/Native compilations and tasks to support
Kotlin/Native-shared source sets compilation within the metadata target.
Provide the feature flag kotlin.mpp.enableCommonKlibs that enables
the following behavior:
* compilation of Kotlin/Native-shared source sets to a klib using
the Kotlin/Native compiler.
* compilation of common source sets (not just Kotlin/Native) into a
klib rather than *.kotlin_metadata
Issue #KT-32677 Fixed
Sergey Igushkin
970ee4539b
