Update hashbrown requirement from 0.14.5 to 0.15.1 #34603

Job	Run time
cargo check	42s
cargo test (macos)	20s
build with wasm-pack	37s
cargo test (macos-aarch64)	23s
cargo test (win64)	48s
Check cargo fmt	45s
Verify MSRV (Min Supported Rust Version)	4m 40s
Verify Vendored Code	39s
cargo test (amd64)	0s
cargo test datafusion-cli (amd64)	0s
cargo doc	0s
cargo test doc (amd64)	0s
cargo examples (amd64)	0s
clippy	0s
Run sqllogictest with Postgres runner	0s
cargo test pyarrow (amd64)	0s
verify benchmark results (amd64)	0s
check Cargo.toml formatting	0s
check configs.md and ***_functions.md is up-to-date	0s
cargo test hash collisions (amd64)	0s
	8m 54s

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