Move sum test to slt or optimizer_integration #27583

Job	Run time
Check cargo fmt	42s
cargo test (macos)	10m 3s
cargo check	3m 36s
build with wasm-pack	2m 18s
cargo test (macos-aarch64)	10m 4s
Verify MSRV (Min Supported Rust Version)	6m 34s
Verify Vendored Code	50s
cargo test (win64)	34m 59s
cargo test datafusion-cli (amd64)	3m 43s
cargo test (amd64)	9m 10s
cargo test hash collisions (amd64)	8m 36s
clippy	5m 7s
check Cargo.toml formatting	2m 47s
cargo doc	3m 38s
cargo test doc (amd64)	11m 51s
cargo examples (amd64)	11m 41s
Run sqllogictest with Postgres runner	3m 6s
cargo test pyarrow (amd64)	2m 39s
verify benchmark results (amd64)	10m 19s
check configs.md is up-to-date	2m 40s
	2h 24m 23s

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