Rust

Wrap immutable plan parts into Arc #64

Job	Run time
Verify Vendored Code	1m 26s
Check cargo fmt	1m 12s
cargo test (macos-aarch64)	17m 16s
linux build test	4m 14s
Verify MSRV (Min Supported Rust Version)	4m 53s
build and run with wasm-pack	5m 9s
cargo check datafusion-substrait features	10m 50s
cargo check datafusion-proto features	4m 34s
cargo test datafusion-cli (amd64)	4m 21s
cargo check datafusion-functions features	2m 35s
cargo check datafusion-common features	1m 49s
cargo test (amd64)	11m 34s
cargo check datafusion features	11m 13s
cargo test doc (amd64)	7m 33s
clippy	4m 18s
Run sqllogictest in Substrait round-trip mode	7m 0s
check configs.md and ***_functions.md is up-to-date	5m 2s
verify benchmark results (amd64)	10m 53s
Run sqllogictest with Postgres runner	6m 27s
cargo examples (amd64)	12m 4s
check example README is up-to-date	43s
check Cargo.toml formatting	3m 47s
cargo doc	4m 41s
	2h 23m 34s

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