batch splitting tests #607

Job	Run time
cargo check	3m 2s
Check cargo fmt	56s
build with wasm-pack	2m 33s
cargo test (mac)	13m 4s
Verify MSRV	10m 45s
Verify Vendored Code	1m 12s
cargo test (win64)	25m 6s
cargo test doc (amd64)	9m 17s
cargo doc	4m 51s
Run sqllogictest with Postgres runner	6m 11s
verify benchmark results (amd64)	18m 59s
clippy	4m 27s
cargo test datafusion-cli (amd64)	5m 37s
cargo test (amd64)	12m 3s
cargo examples (amd64)	8m 46s
cargo test pyarrow (amd64)	3m 32s
check Cargo.toml formatting	1m 16s
cargo test hash collisions (amd64)	7m 3s
check configs.md is up-to-date	4m 15s
	2h 22m 55s

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