Support materialized view out-of-place complete refresh cutover in TiFlash schema sync

Enhancement

Support materialized view out-of-place complete refresh in TiFlash schema sync.

Background:

• TiDB introduces ActionCreateMaterializedViewShadow to create the shadow materialized view table during out-of-place refresh.
• TiDB introduces ActionMViewRefreshOutOfPlaceCutover to atomically cut over from the old materialized view table to the refreshed shadow table.
• TiFlash schema sync needs to understand both actions so local metadata stays consistent during the refresh flow.

Expected behavior:

• Treat ActionCreateMaterializedViewShadow like materialized view table creation and register the shadow table in schema sync.
• Handle ActionMViewRefreshOutOfPlaceCutover by renaming the shadow table to the logical MV name and tombstoning the old MV table ID in the same schema version.
• Add schema sync test coverage for the full out-of-place refresh cutover flow.

Start in the TiFlash schema sync handling for materialized view table creation and trace how schema actions update local metadata. Add coverage for ActionCreateMaterializedViewShadow followed by ActionMViewRefreshOutOfPlaceCutover, verifying the shadow is renamed to the logical materialized view name and the old table ID is tombstoned in the same schema version.