graph, store: Remove GRAPH_STORE_LAST_ROLLUP_FROM_POI #9618

Job	Run time
Subgraph Runner integration tests	3m 9s
Run integration tests	5m 55s
Clippy linting	4m 13s
Build in release mode	59s
Check rustfmt style	8s
Run unit tests	12m 1s
	26m 25s

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