Define current arrow_cast behavior for BinaryView #31418

Job	Run time
build with wasm-pack	2m 24s
cargo check	5m 36s
cargo test (macos)	10m 35s
cargo test (macos-aarch64)	11m 32s
cargo test (win64)	43m 22s
Check cargo fmt	42s
Verify MSRV (Min Supported Rust Version)	7m 17s
Verify Vendored Code	55s
cargo test (amd64)	9m 44s
cargo test datafusion-cli (amd64)	4m 8s
clippy	5m 44s
cargo test hash collisions (amd64)	14m 13s
cargo doc	3m 49s
check Cargo.toml formatting	3m 2s
cargo test doc (amd64)	15m 6s
cargo examples (amd64)	13m 11s
Run sqllogictest with Postgres runner	3m 39s
cargo test pyarrow (amd64)	2m 53s
verify benchmark results (amd64)	12m 12s
check configs.md is up-to-date	2m 52s
	2h 52m 56s

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