fix: Fix various complaints from the latest nightly clippy #30656

Job	Run time
cargo check	8m 24s
build with wasm-pack	2m 21s
cargo test (macos)	9m 4s
cargo test (win64)	40m 33s
cargo test (macos-aarch64)	9m 6s
Check cargo fmt	31s
Verify MSRV (Min Supported Rust Version)	6m 42s
Verify Vendored Code	54s
cargo test (amd64)	9m 10s
cargo test datafusion-cli (amd64)	3m 44s
cargo examples (amd64)	12m 45s
clippy	5m 10s
cargo doc	3m 41s
cargo test doc (amd64)	13m 52s
cargo test pyarrow (amd64)	3m 0s
verify benchmark results (amd64)	10m 53s
check Cargo.toml formatting	2m 42s
Run sqllogictest with Postgres runner	3m 20s
check configs.md is up-to-date	2m 37s
cargo test hash collisions (amd64)	13m 46s
	2h 42m 15s

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