AVRO-3905: [Rust] Fix clippy error with Rust 1.74.0 (#2588) #2161

Job	Run time
Rust on Linux ARM64	6m 26s
ci (stable, x86_64-unknown-linux-gnu)	7m 41s
ci (stable, wasm32-unknown-unknown)	1m 33s
interop	5m 11s
web-assembly	1m 14s
ci (beta, x86_64-unknown-linux-gnu)	3m 13s
ci (beta, wasm32-unknown-unknown)	1m 24s
ci (nightly, x86_64-unknown-linux-gnu)	3m 33s
ci (nightly, wasm32-unknown-unknown)	1m 26s
ci (1.65.0, x86_64-unknown-linux-gnu)	3m 17s
ci (1.65.0, wasm32-unknown-unknown)	43s
	35m 41s

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