Rust

test: improve `rpad` sqllogictest coverage #72180

Job	Run time
Verify Vendored Code	1m 33s
cargo test (macos-aarch64)	8m 10s
Verify MSRV (Min Supported Rust Version)	6m 12s
build and run with wasm-pack	6m 20s
Check GitHub Actions install tooling	6s
linux build test	6m 10s
Check cargo fmt	1m 13s
cargo check datafusion-functions features	2m 41s
cargo check datafusion-substrait features	13m 10s
cargo check datafusion-common features	2m 11s
cargo check datafusion-ffi features	2m 44s
cargo doc	6m 8s
Run sqllogictest in Substrait round-trip mode	7m 57s
cargo check datafusion features	10m 49s
cargo check datafusion-proto features	5m 20s
verify benchmark results (amd64)	16m 41s
clippy	8m 20s
cargo examples (amd64)	17m 2s
Run sqllogictest with Postgres runner	7m 24s
cargo test (amd64)	18m 0s
check Cargo.toml formatting	1m 22s
cargo test datafusion-cli (amd64)	6m 25s
cargo test doc (amd64)	10m 5s
check configs.md and ***_functions.md is up-to-date	7m 3s
check example README is up-to-date	5m 55s
	2h 59m 1s

Provide feedback