Fix group by aliased expression in LogicalPLanBuilder::aggregate #21395

Job	Run time
Check cargo fmt	39s
cargo check	3m 7s
build with wasm-pack	1m 59s
cargo test (mac)	13m 54s
Verify MSRV	6m 22s
Verify Vendored Code	47s
cargo test (win64)	26m 29s
cargo test (amd64)	9m 4s
cargo examples (amd64)	6m 21s
clippy	4m 21s
cargo doc	3m 9s
cargo test doc (amd64)	9m 32s
Run sqllogictest with Postgres runner	3m 6s
cargo test pyarrow (amd64)	2m 21s
verify benchmark results (amd64)	9m 37s
cargo test datafusion-cli (amd64)	2m 55s
check configs.md is up-to-date	2m 16s
check Cargo.toml formatting	1m 20s
cargo test hash collisions (amd64)	8m 41s
	1h 56m 0s

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