implement string_to_array (#7577) #18614

Job	Run time
cargo check	7m 39s
cargo test (win64)	24m 29s
Check cargo fmt	50s
cargo test (mac)	28m 13s
Verify MSRV	12m 16s
Verify Vendored Code	1m 11s
cargo test datafusion-cli (amd64)	4m 48s
cargo test doc (amd64)	16m 23s
check Cargo.toml formatting	1m 47s
clippy	9m 43s
check configs.md is up-to-date	3m 30s
cargo test hash collisions (amd64)	11m 9s
cargo doc	7m 35s
cargo test (amd64)	15m 57s
cargo examples (amd64)	7m 6s
Run sqllogictest with Postgres runner	5m 36s
cargo test pyarrow (amd64)	3m 29s
verify benchmark results (amd64)	44m 3s
	3h 25m 44s

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