Avoid unecessary copy when reading arrow files #30454

Job	Run time
cargo check	7m 27s
build with wasm-pack	2m 28s
cargo test (macos)	8m 36s
cargo test (macos-aarch64)	10m 45s
cargo test (win64)	40m 0s
Check cargo fmt	44s
Verify Vendored Code	1m 6s
Verify MSRV (Min Supported Rust Version)	6m 35s
cargo examples (amd64)	12m 33s
cargo test (amd64)	9m 31s
clippy	5m 11s
cargo doc	3m 43s
cargo test datafusion-cli (amd64)	3m 53s
cargo test doc (amd64)	14m 23s
Run sqllogictest with Postgres runner	3m 22s
cargo test pyarrow (amd64)	3m 5s
verify benchmark results (amd64)	11m 6s
check Cargo.toml formatting	3m 10s
check configs.md is up-to-date	2m 57s
cargo test hash collisions (amd64)	13m 12s
	2h 43m 47s

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