Rust

fix clippy warnings #548

Job	Run time
Verify Vendored Code	1m 35s
Check cargo fmt	1m 11s
build and run with wasm-pack	5m 7s
linux build test	5m 33s
Verify MSRV (Min Supported Rust Version)	4m 51s
cargo test (macos-aarch64)	20m 3s
cargo check datafusion features	11m 20s
cargo test (amd64)	10m 10s
cargo check datafusion-functions features	2m 51s
cargo check datafusion-common features	2m 31s
cargo examples (amd64)	13m 48s
cargo doc	4m 42s
cargo check datafusion-proto features	4m 29s
cargo check datafusion-substrait features	9m 58s
check example README is up-to-date	39s
check configs.md and ***_functions.md is up-to-date	4m 52s
cargo test doc (amd64)	7m 33s
Run sqllogictest in Substrait round-trip mode	6m 27s
check Cargo.toml formatting	3m 3s
verify benchmark results (amd64)	10m 12s
cargo test datafusion-cli (amd64)	4m 5s
clippy	6m 11s
Run sqllogictest with Postgres runner	6m 10s
	2h 27m 21s

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