Rust

Allow ColumnarValue to array conversion without copying #418

Job	Run time
Check cargo fmt	41s
cargo check	13m 40s
build with wasm-pack	3m 29s
Check License Header	2m 29s
cargo test (macos)	17m 1s
cargo test (macos-aarch64)	17m 33s
Verify MSRV (Min Supported Rust Version)	9m 40s
Verify Vendored Code	53s
cargo test (win64)	1h 9m 0s
cargo test (amd64)	12m 15s
clippy	7m 29s
cargo doc	4m 28s
cargo test datafusion-cli (amd64)	4m 37s
cargo test doc (amd64)	17m 45s
cargo examples (amd64)	15m 23s
Run sqllogictest with Postgres runner	4m 13s
verify benchmark results (amd64)	14m 38s
cargo test pyarrow (amd64)	3m 14s
check Cargo.toml formatting	3m 2s
check configs.md and ***_functions.md is up-to-date	3m 52s
cargo test hash collisions (amd64)	28m 23s
	4h 13m 45s

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