Rust

fix: do not remove DISTINCT when a unique key was downgraded by a join #70594

Job	Run time
build and run with wasm-pack	5m 43s
Verify MSRV (Min Supported Rust Version)	6m 5s
linux build test	7m 22s
Check GitHub Actions install tooling	48s
cargo test (macos-aarch64)	9m 35s
Check cargo fmt	1m 14s
Verify Vendored Code	1m 13s
cargo check datafusion-functions features	3m 15s
cargo check datafusion-substrait features	12m 22s
cargo check datafusion-proto features	5m 22s
cargo check datafusion-ffi features	2m 35s
cargo check datafusion-common features	1m 47s
cargo check datafusion features	12m 11s
cargo test datafusion-cli (amd64)	6m 48s
cargo doc	5m 42s
cargo test (amd64)	19m 0s
check Cargo.toml formatting	4m 36s
Run sqllogictest in Substrait round-trip mode	9m 16s
check example README is up-to-date	6m 17s
clippy	9m 32s
verify benchmark results (amd64)	17m 57s
cargo test doc (amd64)	8m 25s
check configs.md and ***_functions.md is up-to-date	7m 34s
Run sqllogictest with Postgres runner	8m 22s
cargo examples (amd64)	18m 23s
	3h 11m 24s

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