[Draft v2] Another Multi group by optimization #28579

Job	Run time
cargo test (macos)	4m 37s
build with wasm-pack	2m 29s
Check cargo fmt	45s
cargo check	8m 14s
cargo test (macos-aarch64)	4m 21s
Verify MSRV (Min Supported Rust Version)	6m 19s
Verify Vendored Code	55s
cargo test (win64)	9m 59s
cargo test datafusion-cli (amd64)	3m 39s
cargo test (amd64)	6m 40s
cargo examples (amd64)	12m 40s
check Cargo.toml formatting	2m 45s
clippy	5m 3s
check configs.md is up-to-date	2m 23s
cargo test hash collisions (amd64)	6m 24s
cargo doc	3m 48s
cargo test doc (amd64)	12m 41s
Run sqllogictest with Postgres runner	3m 13s
cargo test pyarrow (amd64)	2m 51s
verify benchmark results (amd64)	9m 57s
	1h 49m 43s

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