build(deps): bump tower-test from `35188ec` to `251296d` #11293

Job	Run time
Run unit tests	4m 39s
Check rustfmt style	24s
Clippy linting	2m 30s
Build in release mode	1m 58s
Subgraph Runner integration tests	3m 28s
Run integration tests	4m 55s
	17m 54s

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