Rust

Move `nullif` and `isnan` to datafusion-functions #23230

Job	Run time
build with wasm-pack	2m 17s
cargo test (win64)	43m 15s
Check cargo fmt	44s
cargo check	3m 7s
cargo test (macos)	30m 41s
cargo test (macos-aarch64)	10m 20s
Verify MSRV (Min Supported Rust Version)	6m 59s
Verify Vendored Code	52s
cargo test (amd64)	9m 53s
cargo test hash collisions (amd64)	9m 29s
cargo doc	3m 45s
clippy	5m 30s
cargo test datafusion-cli (amd64)	3m 43s
cargo test doc (amd64)	11m 33s
cargo examples (amd64)	8m 51s
Run sqllogictest with Postgres runner	3m 9s
cargo test pyarrow (amd64)	2m 32s
verify benchmark results (amd64)	10m 13s
check configs.md is up-to-date	2m 40s
check Cargo.toml formatting	1m 36s
	2h 51m 9s

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