refactor(meta): let stream manager handle background ddl recovery instead

[kwannoel]

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What's changed and what's your intention?

1. Let stream manager handle background ddl recovery, so barrier manager doesn't have to maintain recovered stream jobs. That's the role of stream manager.
2. Move finish_stream_job from DdlController into CatalogManager. This method will take care of committing table catalog. It doesn't make sense to call low level CatalogManager functions inside DdlCatalogManager.

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Checklist

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