Support custom struct field names with new scalar function named_struct #25100

Job	Run time
cargo test (macos)	21m 21s
cargo check	3m 18s
build with wasm-pack	2m 22s
Check cargo fmt	37s
cargo test (macos-aarch64)	10m 34s
Verify MSRV (Min Supported Rust Version)	7m 8s
Verify Vendored Code	52s
cargo test (win64)	44m 8s
cargo test (amd64)	10m 20s
cargo test doc (amd64)	12m 26s
cargo test datafusion-cli (amd64)	3m 39s
cargo examples (amd64)	10m 29s
cargo doc	3m 51s
Run sqllogictest with Postgres runner	3m 14s
verify benchmark results (amd64)	10m 20s
check Cargo.toml formatting	2m 51s
clippy	6m 17s
check configs.md is up-to-date	2m 27s
cargo test hash collisions (amd64)	9m 53s
cargo test pyarrow (amd64)	2m 26s
	2h 48m 33s

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