Array: retain intrinsic prototypes and use the active AggregateError realm

[chrisbbreuer]

Parent #465; related #823. Reproduced on pushed e24c4fa, independently of the current Error-intrinsic candidate. Two local forced-tier witnesses fail in the tree walker: replacing globalThis.Array changes the prototype of an array literal; Reflect.construct(AggregateError, [[]], a foreign NewTarget) creates errors with the foreign NewTarget Array prototype instead of the active AggregateError constructor realm. Node 24.18.0 passes both exact witnesses. These are not inferred from an instanceof name heuristic. The existing arrayProto and functionRealmIntrinsicProto Array paths consult public mutable bindings. Acceptance: retain private realm-owned Array identity with tracing/relocation and existing synchronization; use the active constructor realm for CreateArrayFromList while preserving GetPrototypeFromConstructor for the outer AggregateError instance; cover replacement/deletion/shadowing, cross-realm newTarget, callbacks and moving GC in both tiers. Do not copy a public global into a late cache or special-case source strings. Separate from native job/queue lifecycle work.

[chrisbbreuer]

Uncommitted implementation checkpoint: the root-only intrinsic table now groups Error identities and retained Array constructor/prototype identities without adding per-activation storage. Array allocation/species selection and AggregateError array allocation use those private realm identities. The Array constructor roots its arguments across observable prototype lookup.

A new 32-case reference set passes 32/32 in Node 24.18.0, and the matching engine unit passes all 32 in both forced tree-walker and required-bytecode modes (zero failures/leaks). The 2173-test artifact and ReleaseSafe corpus runner compile. Before/after engine probe counts are pending while the separate #826 full suite runs. This is not ready to close or push: explicit added-slot tracing/relocation, moving-GC callbacks, and sanitizer/full integration still need completion.