graph, store: Remove GRAPH_STORE_LAST_ROLLUP_FROM_POI #9568

Job	Run time
Build in release mode	56s
Clippy linting	1m 16s
Run integration tests	5m 15s
Subgraph Runner integration tests	3m 23s
Check rustfmt style	5s
Run unit tests	9m 57s
	20m 52s

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