Rust

Add `Container` trait and its blanket implementations, remove `map_un… #330

Job	Run time
cargo check	8m 59s
Check License Header	2m 29s
Check cargo fmt	44s
build with wasm-pack	2m 38s
cargo test (macos)	14m 18s
cargo test (macos-aarch64)	22m 47s
Verify MSRV (Min Supported Rust Version)	9m 17s
Verify Vendored Code	48s
cargo test (win64)	1h 13m 59s
cargo test hash collisions (amd64)	18m 11s
check configs.md and ***_functions.md is up-to-date	3m 8s
clippy	6m 11s
check Cargo.toml formatting	2m 59s
cargo doc	4m 58s
cargo test (amd64)	11m 37s
cargo test datafusion-cli (amd64)	4m 11s
cargo test doc (amd64)	16m 53s
cargo examples (amd64)	13m 50s
Run sqllogictest with Postgres runner	3m 59s
cargo test pyarrow (amd64)	2m 53s
verify benchmark results (amd64)	13m 20s
	3h 58m 9s

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