Rust

Remove Built-in sum and Rename to lowercase `sum` (#10831) #2

Job	Run time
Check cargo fmt	44s
cargo check	7m 37s
build with wasm-pack	2m 14s
cargo test (macos)	10m 8s
cargo test (macos-aarch64)	8m 43s
Verify MSRV (Min Supported Rust Version)	6m 46s
Verify Vendored Code	1m 3s
cargo test (win64)	34m 26s
cargo test (amd64)	9m 33s
cargo examples (amd64)	12m 15s
cargo test datafusion-cli (amd64)	3m 55s
cargo doc	3m 44s
cargo test doc (amd64)	12m 6s
Run sqllogictest with Postgres runner	3m 14s
cargo test pyarrow (amd64)	2m 34s
verify benchmark results (amd64)	10m 47s
check Cargo.toml formatting	2m 47s
clippy	5m 6s
check configs.md is up-to-date	2m 30s
cargo test hash collisions (amd64)	8m 48s
	2h 29m 0s

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