Rust

add fast-path for `with_new_children` #37

Job	Run time
Verify Vendored Code	2m 10s
build and run with wasm-pack	4m 47s
linux build test	4m 29s
cargo test (macos-aarch64)	16m 38s
Check cargo fmt	1m 47s
Verify MSRV (Min Supported Rust Version)	6m 2s
cargo test (amd64)	9m 51s
cargo test doc (amd64)	9m 5s
cargo check datafusion-proto features	4m 51s
cargo check datafusion-common features	1m 56s
cargo check datafusion features	11m 38s
verify benchmark results (amd64)	11m 44s
cargo check datafusion-functions features	2m 35s
cargo check datafusion-substrait features	9m 57s
check configs.md and ***_functions.md is up-to-date	5m 34s
check Cargo.toml formatting	3m 25s
cargo test datafusion-cli (amd64)	4m 13s
cargo doc	4m 46s
check example README is up-to-date	38s
cargo examples (amd64)	9m 10s
Run sqllogictest in Substrait round-trip mode	6m 29s
Run sqllogictest with Postgres runner	6m 32s
clippy	5m 1s
	2h 23m 18s

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