graph: Remove manual Eq::assert_receiver_is_total_eq impl #11592

Job	Run time
Subgraph Runner integration tests	3m 5s
Run unit tests	2m 15s
Run integration tests	4m 29s
Build in release mode	1m 50s
Clippy linting	1m 42s
Check rustfmt style	13s
	13m 34s

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