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

[windtalker]

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.