chore: remove partition_keys from (Bounded)WindowAggExec #38127

Job	Run time
cargo test (macos-aarch64)	15m 34s
linux build test	4m 50s
Check License Header	2m 27s
Check cargo fmt	42s
build with wasm-pack	3m 55s
Verify MSRV (Min Supported Rust Version)	10m 18s
Verify Vendored Code	50s
cargo check no default features	10m 55s
cargo doc	6m 5s
cargo check datafusion	5m 55s
cargo check functions	2m 20s
cargo test (amd64)	13m 26s
cargo test datafusion-cli (amd64)	5m 35s
cargo test doc (amd64)	20m 0s
cargo examples (amd64)	17m 6s
verify benchmark results (amd64)	9m 7s
check Cargo.toml formatting	3m 10s
clippy	8m 17s
check configs.md and ***_functions.md is up-to-date	4m 23s
Run sqllogictest with Postgres runner	5m 26s
cargo test pyarrow (amd64)	3m 22s
	2h 33m 43s

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