[v18.x] backport various patches of internal refactorings for snapshot and realms#45007

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joyeecheung wants to merge 12 commits intonodejs:v18.x-stagingfrom

joyeecheung:backport-18-patches

Commits on Oct 14, 2022

src: add initial shadow realm support

legendecas
authored and
joyeecheung
committed
src: per-environment time origin value

legendecas
authored and
joyeecheung
committed
src: fix cppgc incompatibility in v8

codebytere
and
joyeecheung
committed
bootstrap: check more metadata when loading the snapshot
joyeecheung
committed
src: iterate over base objects to prepare for snapshot
joyeecheung
committed
src: support WeakReference in snapshot
joyeecheung
committed
src: introduce node::Realm

legendecas
authored and
joyeecheung
committed

Commits on Oct 26, 2022

fixup! src: introduce node::Realm
joyeecheung
committed