Description: Adds pre-population infrastructure to AggExState so non-local namespaces can be resolved via the database primary before catalog locks are acquired, then consulted as a fallback during the locked local resolution pass.

• prePopulateResolvedInvolvedNamespaces(): uses a racy CollectionCatalog snapshot as a heuristic to skip namespaces available locally, then calls resolveInvolvedNamespaceViaDatabasePrimary (SERVER-124445) for the rest. BFS through any nested view references.
• _remoteResolvedNamespacesCache (boost::optional<ResolvedNamespaceMap>): holds the pre-resolved entries.
• AggCatalogState::resolveInvolvedNamespaces: gains a cache-fallback branch that kicks in when the locked local catalog has no entry.
• collatorCompatibleWithPipeline: extended to consult the cache for remote view definitions (branch restructure is semantically identical when the cache is empty).
• invalidateRemoteResolvedNamespacesCache(): cache is invalidated when ResolvedViewAggExState replaces the lite-parsed pipeline.

Rationale: SERVER-42282 resolves foreign namespaces via _shardsvrResolveView on the database primary — a network call that cannot be made under catalog locks. This ticket establishes the pre-lock cache so the main feature PR's diff focuses on the subrouter decision logic rather than the cache plumbing.