Follow-up from #3432.

RemoteTable now carries __getstate__ / __setstate__ so it can be reopened after pickle/spawn and fork. Permutation still contains local LanceTable serialization helpers for native and in-memory tables, which makes the ownership of table pickling asymmetric.

We should move local table pickle support onto LanceTable itself so code that needs a picklable table can rely on the table abstraction instead of duplicating table-specific reopen logic.

Suggested scope:

• Add __getstate__ / __setstate__ to LanceTable for persisted local tables.
• Decide whether in-memory tables should inline Arrow data or remain unsupported by default.
• Update Permutation to rely on table pickle support instead of local helper functions.
• Preserve existing with_connection_factory as the escape hatch for custom worker-side connection setup.