Port ArrayElem/Slice/PopFront/Back into `functions-array` #24480

Job	Run time
cargo check	3m 17s
build with wasm-pack	2m 25s
cargo test (macos)	16m 35s
Verify Vendored Code	53s
cargo test (win64)	42m 11s
cargo test (macos-aarch64)	11m 11s
Check cargo fmt	43s
Verify MSRV (Min Supported Rust Version)	6m 55s
cargo test doc (amd64)	12m 52s
cargo examples (amd64)	10m 38s
cargo doc	3m 49s
cargo test hash collisions (amd64)	9m 54s
cargo test (amd64)	10m 43s
cargo test datafusion-cli (amd64)	3m 28s
Run sqllogictest with Postgres runner	3m 17s
clippy	5m 50s
cargo test pyarrow (amd64)	2m 30s
verify benchmark results (amd64)	10m 46s
check Cargo.toml formatting	3m 5s
check configs.md is up-to-date	2m 36s
	2h 43m 38s

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