Rust

Gate new ScalarSubqueryExec node behind session property #67160

Job	Run time
cargo test (macos-aarch64)	6m 35s
linux build test	4m 55s
Verify Vendored Code	1m 31s
Check cargo fmt	1m 15s
build and run with wasm-pack	6m 1s
Verify MSRV (Min Supported Rust Version)	6m 22s
cargo test doc (amd64)	9m 14s
cargo check datafusion-proto features	4m 16s
cargo check datafusion features	11m 32s
cargo examples (amd64)	12m 30s
cargo test (amd64)	11m 14s
cargo check datafusion-functions features	2m 54s
cargo check datafusion-common features	2m 4s
Run sqllogictest in Substrait round-trip mode	7m 14s
cargo test datafusion-cli (amd64)	5m 36s
clippy	5m 24s
Run sqllogictest with Postgres runner	8m 21s
cargo check datafusion-substrait features	12m 13s
verify benchmark results (amd64)	14m 10s
check example README is up-to-date	5m 49s
cargo doc	5m 52s
check Cargo.toml formatting	3m 14s
check configs.md and ***_functions.md is up-to-date	6m 12s
	2h 34m 28s

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