build(deps): bump tower-test from `39adf5c` to `abb375d` #9676

Job	Run time
Run unit tests	12m 16s
Build in release mode	1m 7s
Clippy linting	1m 11s
Run integration tests	6m 26s
Subgraph Runner integration tests	4m 32s
Check rustfmt style	7s
	25m 39s

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