build(deps): bump tower-test from `35188ec` to `251296d` #11294

Job	Run time
Build in release mode	2m 46s
Clippy linting	1m 44s
Check rustfmt style	29s
Run unit tests	4m 2s
Subgraph Runner integration tests	3m 7s
Run integration tests	5m 26s
	17m 34s

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