Rust

[MINOR]: Some code changes and a new empty batch guard for SHJ (#8557) #1072

Job	Run time
cargo test (mac)	17m 10s
cargo test (win64)	27m 54s
Check cargo fmt	40s
cargo check	2m 20s
build with wasm-pack	1m 54s
Verify MSRV	6m 26s
Verify Vendored Code	43s
cargo test (amd64)	8m 54s
cargo test doc (amd64)	9m 53s
cargo test datafusion-cli (amd64)	2m 58s
Run sqllogictest with Postgres runner	3m 9s
cargo examples (amd64)	6m 12s
cargo test pyarrow (amd64)	2m 18s
verify benchmark results (amd64)	9m 21s
check Cargo.toml formatting	1m 11s
clippy	4m 23s
check configs.md is up-to-date	2m 9s
cargo test hash collisions (amd64)	8m 27s
cargo doc	3m 20s
	1h 59m 22s

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