Update hashbrown requirement from 0.14.5 to 0.15.1 #34604

Job	Run time
Check cargo fmt	39s
cargo check	40s
build with wasm-pack	37s
cargo test (macos)	20s
cargo test (macos-aarch64)	19s
Verify MSRV (Min Supported Rust Version)	4m 51s
Verify Vendored Code	33s
cargo test (win64)	1m 22s
cargo test doc (amd64)	0s
cargo doc	0s
cargo test (amd64)	0s
cargo test datafusion-cli (amd64)	0s
cargo examples (amd64)	0s
cargo test pyarrow (amd64)	0s
check Cargo.toml formatting	0s
clippy	0s
cargo test hash collisions (amd64)	0s
verify benchmark results (amd64)	0s
Run sqllogictest with Postgres runner	0s
check configs.md and ***_functions.md is up-to-date	0s
	9m 21s

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