node: Wire up ChainSection.ingestor to control block ingestion #11411

Job	Run time
Subgraph Runner integration tests	1m 53s
Build in release mode	1m 20s
Clippy linting	1m 42s
Check rustfmt style	12s
Run integration tests	2m 25s
Run unit tests	2m 11s
	9m 43s

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