Rust

Migrate to_timestamp* functions to new functions crate. #43

Job	Run time
cargo check	10m 14s
cargo test (win64)	51m 12s
build with wasm-pack	1m 31s
Check cargo fmt	45s
cargo test (macos)	25m 58s
cargo test (macos-aarch64)	11m 35s
Verify MSRV (Min Supported Rust Version)	7m 18s
Verify Vendored Code	1m 39s
cargo test datafusion-cli (amd64)	4m 40s
cargo doc	3m 59s
cargo test (amd64)	11m 15s
cargo test doc (amd64)	13m 18s
clippy	5m 52s
cargo examples (amd64)	7m 54s
Run sqllogictest with Postgres runner	3m 36s
cargo test pyarrow (amd64)	2m 48s
verify benchmark results (amd64)	10m 37s
check Cargo.toml formatting	3m 6s
check configs.md is up-to-date	3m 45s
cargo test hash collisions (amd64)	10m 40s
	3h 11m 42s

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