fix: procedure takes too much memory

[dantengsky]

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Summary

WIP:

• [x] tweak Procedure interface

  adapt to the style of new-processor, so that procedure can return data as stream

• [x] tweak system$fuse_snapshot

• [x] tweak system$fuse_segment

  currently, these two procedures may take too much memory

• [ ] tweak ResultWriter write result back to client in a streaming way

Fixes #issue

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Name	Status	Preview	Updated
databend	✅ Ready (Inspect)	Visit Preview	Aug 17, 2022 at 6:13AM (UTC)