Rust

Remove hardcoded value #45

Job	Run time
build and run with wasm-pack	5m 8s
Verify Vendored Code	1m 45s
linux build test	3m 44s
cargo test (macos-aarch64)	12m 55s
Check cargo fmt	1m 30s
Verify MSRV (Min Supported Rust Version)	5m 13s
cargo examples (amd64)	8m 54s
cargo test (amd64)	10m 19s
cargo check datafusion-substrait features	10m 17s
cargo check datafusion-proto features	5m 1s
cargo check datafusion features	11m 0s
cargo check datafusion-functions features	2m 41s
Run sqllogictest with Postgres runner	6m 38s
cargo check datafusion-common features	2m 28s
check Cargo.toml formatting	3m 28s
clippy	4m 35s
cargo doc	5m 6s
verify benchmark results (amd64)	11m 3s
cargo test doc (amd64)	8m 20s
check configs.md and ***_functions.md is up-to-date	6m 32s
Run sqllogictest in Substrait round-trip mode	6m 41s
check example README is up-to-date	5m 53s
cargo test datafusion-cli (amd64)	5m 30s
	2h 24m 41s

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