Rust

Migrate ToUnixtimeFunc to implement invoke_batch #318

Job	Run time
cargo check	1m 25s
Check cargo fmt	44s
cargo test (macos)	3m 26s
build with wasm-pack	2m 1s
cargo test (macos-aarch64)	2m 25s
Verify MSRV (Min Supported Rust Version)	5m 20s
Verify Vendored Code	52s
cargo test (win64)	6m 3s
cargo test doc (amd64)	0s
cargo examples (amd64)	0s
cargo test (amd64)	0s
cargo test datafusion-cli (amd64)	0s
verify benchmark results (amd64)	0s
check Cargo.toml formatting	0s
clippy	0s
check configs.md and ***_functions.md is up-to-date	0s
cargo doc	0s
Run sqllogictest with Postgres runner	0s
cargo test hash collisions (amd64)	0s
cargo test pyarrow (amd64)	0s
	22m 16s

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