Rust

docs: move TopK user defined operator example into extending-operators guide #68110

Job	Run time
Verify MSRV (Min Supported Rust Version)	6m 20s
cargo test (macos-aarch64)	4m 15s
Check cargo fmt	56s
linux build test	5m 39s
Verify Vendored Code	1m 24s
build and run with wasm-pack	7m 9s
cargo check datafusion-common features	1m 45s
cargo check datafusion-substrait features	12m 10s
cargo check datafusion-functions features	2m 52s
cargo check datafusion features	12m 13s
cargo examples (amd64)	14m 1s
cargo check datafusion-proto features	1m 1s
Run sqllogictest with Postgres runner	7m 12s
check Cargo.toml formatting	3m 29s
verify benchmark results (amd64)	14m 5s
cargo test (amd64)	13m 37s
check example README is up-to-date	5m 34s
cargo test datafusion-cli (amd64)	6m 32s
cargo doc	5m 45s
Run sqllogictest in Substrait round-trip mode	8m 28s
clippy	7m 26s
cargo test doc (amd64)	11m 30s
check configs.md and ***_functions.md is up-to-date	6m 8s
	2h 39m 31s

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